XOMA Corp - Quarter Report: 2015 March (Form 10-Q)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

☒	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2015

☐	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from __________to__________

Commission File No. 0-14710

XOMA Corporation

(Exact name of registrant as specified in its charter)

Delaware		52-2154066
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification No.)

2910 Seventh Street, Berkeley, California 94710		(510) 204-7200
(Address of principal executive offices, including zip code)		(Telephone Number)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act).

Large accelerated filer ☐

Accelerated filer ☒

Non-accelerated filer ☐

(Do not check if a smaller reporting company)

Smaller reporting company ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act of 1934). Yes ☐ No ☒

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Class	Outstanding at May 5, 2015
Common Stock, $0.0075 par value	117,815,481

XOMA CORPORATION

FORM 10-Q

TABLE OF CONTENTS

		Page
PART I FINANCIAL INFORMATION
Item 1.	Condensed Consolidated Financial Statements (unaudited)
	Condensed Consolidated Balance Sheets as of March 31, 2015 and December 31, 2014	1
	Condensed Consolidated Statements of Comprehensive Loss for the Three Months Ended March 31, 2015 and 2014	2
	Condensed Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2015 and 2014	3
	Notes to Condensed Consolidated Financial Statements	4
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	18
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	27
Item 4.	Controls and Procedures	27
PART II OTHER INFORMATION
Item 1.	Legal Proceedings	28
Item 1A.	Risk Factors	28
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	45
Item 3.	Defaults Upon Senior Securities	45
Item 4.	Mine Safety Disclosure	45
Item 5.	Other Information	45
Item 6.	Exhibits	45
Signatures		46

Table of Contents

PART I -

ITEM 1.

FINANCIAL INFORMATION

CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

XOMA CORPORATION

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except share and per share amounts)

	March 31, 2015			December 31, 2014
	(unaudited)			(Note 1)
ASSETS
Current assets:
Cash and cash equivalents	$	67,491		$	78,445
Trade and other receivables, net		3,271			3,309
Prepaid expenses and other current assets		1,860			1,859
Total current assets		72,622			83,613
Property and equipment, net		4,783			5,120
Other assets		664			669
Total assets	$	78,069		$	89,402

LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY
Current liabilities:
Accounts payable	$	3,406		$	5,990
Accrued and other liabilities		5,992			9,892
Deferred revenue - current		1,089			1,089
Interest bearing obligations – current		15,605			19,018
Accrued interest on interest bearing obligations – current		335			257
Total current liabilities		26,427			36,246
Deferred revenue – long-term		1,574			1,939
Interest bearing obligations – long-term		31,584			16,290
Contingent warrant liabilities		31,868			31,828
Total liabilities		91,453			86,303

Commitments and Contingencies (Note 7)		-			-

Stockholders’ (deficit) equity:
Preferred stock, $0.05 par value, 1,000,000 shares authorized, 0 issued and outstanding		-			-
Common stock, $0.0075 par value, 277,333,332 shares authorized, 116,947,716 and 115,892,450 shares issued and outstanding at March 31, 2015 and December 31, 2014, respectively		877			869
Additional paid-in capital		1,126,934			1,121,707
Accumulated deficit		(1,141,195	)		(1,119,477	)
Total stockholders’ (deficit) equity		(13,384	)		3,099
Total liabilities and stockholders’ (deficit) equity	$	78,069		$	89,402

The accompanying notes are an integral part of these condensed consolidated financial statements.

(Note 1) The condensed consolidated balance sheet as of December 31, 2014 has been derived from the audited consolidated financial statements as of that date included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014.

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XOMA CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS

(unaudited)

(in thousands, except per share amounts)

	Three months ended March 31,
	2015			2014
Revenues:
License and collaborative fees	$	263		$	964
Contract and other		2,388			2,446
Total revenues		2,651			3,410

Operating expenses:
Research and development		20,004			21,546
Selling, general and administrative		5,220			5,254
Restructuring		-			84
Total operating expenses		25,224			26,884

Loss from operations		(22,573	)		(23,474	)

Other income (expense):
Interest expense		(1,115	)		(1,125	)
Other income (expense), net		2,010			(90	)
Revaluation of contingent warrant liabilities		(40	)		20,002
Net loss	$	(21,718	)	$	(4,687	)

Basic net loss per share of common stock	$	(0.19	)	$	(0.04	)
Diluted net loss per share of common stock	$	(0.19	)	$	(0.21	)

Shares used in computing basic net loss per share of common stock		116,193			106,158

Shares used in computing diluted net loss per share of common stock		116,193			115,524

Other comprehensive loss:
Net loss	$	(21,718	)	$	(4,687	)
Net unrealized gains on available-for-sale securities		-			7
Comprehensive loss	$	(21,718	)	$	(4,680	)

The accompanying notes are an integral part of these condensed consolidated financial statements.

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XOMA CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited)

(in thousands)

	Three Months Ended March 31,
	2015			2014
Cash flows from operating activities:
Net loss	$	(21,718	)	$	(4,687	)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation		458			477
Common stock contribution to 401(k)		986			870
Stock-based compensation expense		3,665			3,924
Accrued interest on interest bearing obligations		90			(1,764	)
Revaluation of contingent warrant liabilities		40			(20,002	)
Amortization of debt discount, final payment fee on debt, and debt issuance costs		296			674
Loss on loan extinguishment		429			-
Unrealized gain on foreign currency exchange		(1,949	)		(66	)
Unrealized loss on foreign exchange options		5			122
Other non-cash adjustments		-			1
Changes in assets and liabilities:
Trade and other receivables, net		38			(530	)
Prepaid expenses and other assets		(2	)		(923	)
Accounts payable and accrued liabilities		(6,455	)		(5,721	)
Deferred revenue		(163	)		(524	)
Other liabilities		-			(51	)
Net cash used in operating activities		(24,280	)		(28,200	)

Cash flows from investing activities:
Net purchase of property and equipment		(225	)		(49	)
Net cash used in investing activities		(225	)		(49	)

Cash flows from financing activities:
Proceeds from issuance of common stock, net of issuance costs		134			3,053
Proceeds from exercise of warrants		-			35
Proceeds from issuance of long term debt		20,000			-
Debt issuance costs and loan fees		(477	)		-
Principal payments of debt		(6,083	)		(2,792	)
Net cash provided by financing activities		13,574			296

Effect of exchange rate changes on cash		(23	)		-

Net decrease in cash and cash equivalents		(10,954	)		(27,953	)
Cash and cash equivalents at the beginning of the period		78,445			101,659
Cash and cash equivalents at the end of the period	$	67,491		$	73,706

Supplemental Cash Flow Information:
Cash paid for:
Interest	$	333		$	2,194
Non-cash financing activities:
Reclassification of contingent warrant liability to equity upon exercise of warrants	$	-		$	(2,525	)
Issuance of warrants	$	450		$	-

The accompanying notes are an integral part of these condensed consolidated financial statements.

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XOMA CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

1.	Description of Business

XOMA Corporation (“XOMA” or the “Company”), a Delaware corporation combines a portfolio of late-stage clinical programs and research activities to develop innovative therapeutic antibodies that it intends to commercialize. XOMA focuses its scientific research on allosteric modulation, which offers opportunities for new classes of therapeutic antibodies to treat a wide range of human diseases. XOMA is developing its lead product candidate gevokizumab (IL-1 beta modulating antibody) with Servier, its partner for gevokizumab, through a global Phase 3 clinical development program and ongoing proof-of-concept studies in other IL-1-mediated diseases. XOMA’s scientific research also has produced the XMet platform, which consists of three classes of Selective Insulin Receptor Modulators antibodies that could offer new approaches in the treatment of metabolic diseases. The Company’s products are presently in various stages of development and are subject to regulatory approval before they can be commercially launched.

Liquidity and Management Plans

The Company has incurred operating losses since its inception and had an accumulated deficit of $1.1 billion at March 31, 2015. Management expects operating losses and negative cash flows to continue for the foreseeable future. As of March 31, 2015, the Company had $67.5 million in cash and cash equivalents, which is available to fund future operations. Taking into account the repayment of its outstanding debt classified within current liabilities on the Company’s condensed consolidated balance sheet at March 31, 2015, the Company anticipates that it will be required to seek additional equity or debt financing or to increase the level of collaborative revenues to fund its operations through the next 12 months. If the Company is unable to achieve the level of revenues from licensing, development and collaboration agreements and the level of government funding and external financing during the next 12 months, as contemplated in its operating plan, the Company has plans to implement certain cost cutting actions commencing early in the fourth quarter of 2015 to reduce its working capital requirements. Consistent with the actions the Company has taken in the past, it will prioritize necessary and appropriate steps to enable the continued operations of the business and preservation of the value of its assets beyond the next twelve months, including but not limited to actions such as reducing personnel-related costs, additional curtailment of the Company’s development activities and reducing other discretionary expenditures that are within the Company’s control. These reductions in expenditures, if required, may have an adverse impact on the Company’s ability to achieve certain of its planned objectives during this time period. In addition to seeking equity or debt financing, the Company may seek to access additional capital to support future operations through licensing, partnering or other strategic collaborative arrangements. It is unclear if or when any such transactions will occur, on satisfactory terms or at all. The Company’s ability to raise additional capital in the equity and debt markets, should the Company choose to do so, is dependent on a number of factors, including, but not limited to, the market demand for the Company’s common stock, which itself is subject to a number of pharmaceutical development and business risks and uncertainties, as well as the uncertainty that the Company would be able to raise such additional capital at a price or on terms that are favorable to the Company.

2.	Basis of Presentation and Significant Accounting Policies

Basis of Presentation

The condensed consolidated financial statements include the accounts of XOMA and its subsidiaries. All intercompany accounts and transactions among consolidated entities were eliminated during consolidation. The unaudited financial statements were prepared in accordance with accounting principles generally accepted (“GAAP”) in the United States for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. As permitted under those rules certain footnotes or other financial information can be condensed or omitted. These financial statements and related disclosures have been prepared with the assumption that users of the interim financial information have read or have access to the audited financial statements for the preceding fiscal year. Accordingly, these statements should be read in conjunction with the audited consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2014, filed with the U.S. Securities and Exchange Commission (“SEC”) on March 11, 2015.

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XOMA CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(unaudited)

In management’s opinion, the accompanying unaudited condensed consolidated financial statements include all adjustments, consisting only of normal recurring adjustments, which are necessary to present fairly the Company’s consolidated financial position as of March 31, 2015 and the consolidated results of the Company’s operations and the Company’s cash flows for the three month periods ended March 31, 2015 and 2014. The interim results of operations are not necessarily indicative of the results that may be expected for the full fiscal year or any other periods.

Restatement

The Company determined that a restatement was required to the previously reported diluted loss per share of common stock for the three months ended March 31, 2014, and filed an Amended Quarterly Report on Form 10-Q/A on August 7, 2014.

Use of Estimates

The preparation of financial statements in conformity with GAAP in the United States requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses, and related disclosures. On an on-going basis, management evaluates its estimates including, but not limited to, those related to contingent warrant liabilities, revenue recognition, debt amendments, research and development expense, long-lived assets, derivative instruments and stock-based compensation. The Company bases its estimates on historical experience and on various other market-specific and other relevant assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ significantly from these estimates, such as the Company’s billing under government contracts and the Company’s accrual for clinical trial expenses. Under the Company’s contracts with the National Institute of Allergy and Infectious Diseases (“NIAID”), a part of the National Institutes of Health (“NIH”), the Company bills using NIH provisional rates and thus is subject to future audits at the discretion of NIAID’s contracting office. These audits can result in an adjustment to revenue previously reported which potentially could be significant. The Company’s accrual for clinical trials is based on estimates of the services received and efforts expended pursuant to contracts with clinical trial centers and clinical research organizations. Payments under the contracts depend on factors such as the achievement of certain events, successful enrollment of patients, and completion of portions of the clinical trial or similar conditions.

Reclassifications

Certain reclassifications of prior period amounts have been made to the financial statements and accompanying notes to conform to the current period presentation. These reclassifications had no impact on the Company’s previously reported net loss or cash flows.

The Company early adopted ASU 2015-03, Interest—Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs (“ASU 2015-03”). Debt issuance costs of $0.2 million as of December 31, 2014 have been reclassified from Prepaid Expenses and Other Current Assets to Interest Bearing Obligations – Current and Long-term, as applicable. The Company had no long-term debt issuance costs as of December 31, 2014.

Revenue Recognition

Revenue is recognized when the four basic criteria of revenue recognition are met: (1) persuasive evidence of an arrangement exists; (2) delivery has occurred or services have been rendered; (3) the fee is fixed or determinable; and (4) collectability is reasonably assured. The determination of criteria (2) is based on management’s judgments regarding whether a continuing performance obligation exists. The determination of criteria (3) and (4) are based on management’s judgments regarding the nature of the fee charged for products or services delivered and the collectability of those fees. Allowances are established for estimated uncollectible amounts, if any.

The Company recognizes revenue from its license and collaboration arrangements, contract services, product sales and royalties. Revenue arrangements with multiple elements are divided into separate units of accounting if certain criteria are met, including whether the delivered element has stand-alone value to the customer and whether there is objective and reliable evidence of the fair value of the undelivered items. Each deliverable in the arrangement is evaluated to determine whether it meets the criteria to be accounted for as a separate unit of accounting or whether it should be combined with other deliverables. In order to account for the multiple-element arrangements, the Company identifies the deliverables included within the arrangement and evaluates which deliverables represent separate units of accounting. Analyzing the arrangement to identify deliverables requires the use of judgment, and each deliverable may be an obligation to deliver services, a right or license to use an asset, or another performance obligation. The consideration received is allocated among the separate units of accounting based on their respective fair values and the applicable revenue recognition criteria are applied to each of the separate units. Advance payments received in excess of amounts earned are classified as deferred revenue until earned.

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XOMA CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(unaudited)

License and Collaborative Fees

Revenue from non-refundable up-front license, technology access or other payments under license and collaborative agreements where the Company has a continuing obligation to perform is recognized as revenue over the estimated period of the continuing performance obligation. The Company estimates the performance period at the inception of the arrangement and reevaluates it each reporting period. Management makes its best estimate of the period over which it expects to fulfill the performance obligations, which may include clinical development activities. Given the uncertainties of research and development collaborations, significant judgment is required to determine the duration of the performance period. This reevaluation may shorten or lengthen the period over which the remaining revenue is recognized. Changes to these estimates are recorded on a prospective basis.

License and collaboration agreements with certain third parties also provide for contingent payments to be paid to XOMA based solely upon the performance of the partner. For such contingent payments revenue is recognized upon completion of the milestone event, once confirmation is received from the third party, provided that collection is reasonably assured and the other revenue recognition criteria have been satisfied. Milestone payments that are not substantive or that require a continuing performance obligation on the part of the Company are recognized over the expected period of the continuing performance obligation. Amounts received in advance are recorded as deferred revenue until the related milestone is completed.

Contract and Other Revenues

Contract revenue for research and development involves the Company providing research and development and manufacturing services to collaborative partners, biodefense contractors or others. Cost reimbursement revenue under collaborative agreements is recorded as Contract and Other Revenues and is recognized as the related research and development costs are incurred, as provided for under the terms of these agreements. Revenue for certain contracts is accounted for by a proportional performance, or output-based, method where performance is based on estimated progress toward elements defined in the contract. The amount of contract revenue and related costs recognized in each accounting period are based on management’s estimates of the proportional performance during the period. Adjustments to estimates based on actual performance are recognized on a prospective basis and do not result in reversal of revenue should the estimate to complete be extended.

Up-front fees associated with contract revenue are recorded as License and Collaborative Fees and are recognized in the same manner as the final deliverable, which is generally ratably over the period of the continuing performance obligation. Given the uncertainties of research and development collaborations, significant judgment is required to determine the duration of the arrangement.

Royalty revenue and royalty receivables are recorded in the periods these royalty amounts are earned, including when collection is reasonably assured. The royalty revenue and receivables recorded in these instances are based upon communication with collaborative partners or licensees, historical information and forecasted sales trends.

Concentration of Risk

Cash equivalents and receivables are financial instruments, which potentially subject the Company to concentrations of credit risk, as well as liquidity risk for certain cash equivalents, such as money market funds. The Company has not encountered such issues during 2015.

The Company has not experienced any significant credit losses and does not generally require collateral on receivables. For the three months ended and as of March 31, 2015, two customers represented 72% and 26% of total revenue and 61% and 24% of the trade and other receivables balance, respectively. For the three months ended and as of March 31, 2014, three customers represented 47%, 40% and 13% of total revenue and 57%, 28% and 12% of the trade and other receivables balance, respectively.

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XOMA CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(unaudited)

Summary of Significant Accounting Policies

Other than the Company’s adoption of ASU 2015-03, there have been no significant changes in our significant accounting policies during the three months ended March 31, 2015, as compared with those disclosed in our Annual Report on Form 10-K for the year ended December 31, 2014.

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (“FASB”) issued guidance codified in Accounting Standards Codification (“ASC”) 606, Revenue Recognition — Revenue from Contracts with Customers (“ASC 606”), which amends the guidance in former ASC 605, Revenue Recognition. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. On April 1, 2015, the FASB proposed deferring the effective date by one year for public entities for annual and interim periods beginning after December 15, 2017. Early adoption is permitted for periods beginning after December 15, 2016. The Company is currently evaluating the impact of the adoption of the standard on its condensed consolidated financial statements.

In August 2014, the FASB issued ASU No. 2014-15, Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern (“ASU 2014-15”). This ASU introduces an explicit requirement for management to assess if there is substantial doubt about an entity’s ability to continue as a going concern, and to provide related footnote disclosures in certain circumstances. In connection with each annual and interim period, management must assess if there is substantial doubt about an entity’s ability to continue as a going concern within one year after the issuance date. Disclosures are required if conditions give rise to substantial doubt. ASU 2014-15 is effective for all entities in the first annual period ending after December 15, 2016. The Company is currently assessing the potential effects of this ASU on its condensed consolidated financial statements.

In April 2015, the FASB issued ASU 2015-03, which requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The Company early adopted ASU 2015-03 as of January 2015, as permitted. There is no impact of early adoption of ASU 2015-03 on the condensed consolidated statements of comprehensive loss. The impact of early adoption on the condensed consolidated balance sheets for the periods presented is noted in the table below (in thousands):

	March 31, 2015							December 31, 2014
	Prior to Adoption of ASU 2015-03		ASU 2015-03 Adjustment			As Adopted		Prior to Adoption of ASU 2015-03		ASU 2015-03 Adjustment			As Adopted

Prepaid expenses and other current assets	$	1,996	$	(136	)	$	1,860	$	2,088	$	(229	)	$	1,859
Total current assets	$	72,758	$	(136	)	$	72,622	$	83,842	$	(229	)	$	83,613
Other assets	$	990	$	(326	)	$	664	$	669	$	-		$	669
Total assets	$	78,531	$	(462	)	$	78,069	$	89,631	$	(229	)	$	89,402

Interest bearing obligations – current	$	15,741	$	(136	)	$	15,605	$	19,247	$	(229	)	$	19,018
Total current liabilities	$	26,563	$	(136	)	$	26,427	$	36,475	$	(229	)	$	36,246
Interest bearing obligations – long-term	$	31,910	$	(326	)	$	31,584	$	16,290	$	-		$	16,290
Total liabilities	$	91,915	$	(462	)	$	91,453	$	86,532	$	(229	)	$	86,303

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XOMA CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(unaudited)

3.	Condensed Consolidated Financial Statements Detail

Net Loss Per Share of Common Stock

Basic net loss per share of common stock is based on the weighted average number of shares of common stock outstanding during the period. Diluted net loss per share of common stock is based on the weighted average number of shares outstanding during the period, adjusted to include the assumed conversion of certain stock options, restricted stock units (“RSUs”), and warrants for common stock. The calculation of diluted loss per share also requires that, to the extent the average market price of the underlying shares for the reporting period exceeds the exercise price of the warrants and the presumed exercise of such securities are dilutive to earnings (loss) per share for the period, adjustments to net income or net loss used in the calculation are required to remove the change in fair value of the warrants for the period. Likewise, adjustments to the denominator are required to reflect the related dilutive shares.

Potentially dilutive securities are excluded from the calculation of loss per share of common stock if their inclusion is anti-dilutive. The following table shows the total outstanding securities considered anti-dilutive and therefore excluded from the computation of diluted net loss per share (in thousands):

	March 31,
	2015		2014
Common stock options and restricted stock units		8,756		5,732
Warrants for common stock		20,690		1,910
Total		29,446		7,642

For the three months ended March 31, 2015 and 2014, the following is a reconciliation of the numerators and denominators of the basic and diluted net loss per share of common stock (in thousands):

	Three Months Ended March 31,
	2015			2014
Numerator
Net loss
Basic	$	(21,718	)	$	(4,687	)
Adjustment for revaluation of contingent warrant liabilities		-			(19,534	)
Diluted	$	(21,718	)	$	(24,221	)

Denominator
Weighted average shares outstanding used for basic net loss per share		116,193			106,158
Effect of dilutive warrants		-			9,366
Weighted average shares outstanding and dilutive securities used for diluted net loss per share		116,193			115,524

Cash and Cash Equivalents

As of March 31, 2015, cash and cash equivalents consisted of demand deposits of $7.4 million and money market funds of $60.1 million with maturities of less than 90 days from the date of purchase. As of December 31, 2014, cash and cash equivalents consisted of demand deposits of $10.8 million and money market funds of $67.6 million with maturities of less than 90 days at the date of purchase.

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XOMA CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(unaudited)

Accrued and Other Liabilities

Accrued and other liabilities consisted of the following at March 31, 2015 and December 31, 2014 (in thousands):

	March 31, 2015		December 31, 2014
Accrued payroll and other benefits	$	2,578	$	3,061
Accrued management incentive compensation		1,149		4,295
Accrued clinical trial costs		1,079		1,424
Other		1,186		1,112
Total	$	5,992	$	9,892

Contingent Warrant Liabilities

In December 2014, in connection with a registered direct offering to select institutional investors, the Company issued two-year warrants to purchase up to an aggregate of 8,097,165 shares of XOMA’s common stock at an exercise price of $7.90 per share. These warrants contain provisions that are contingent on the occurrence of a change in control, which could conditionally obligate the Company to repurchase the warrants for cash in an amount equal to their fair value using the Black-Scholes Option Pricing Model (the “Black-Scholes Model”) on the date of such change in control. Due to these provisions, the Company accounts for the warrants issued in December 2014 as a liability at fair value. In addition, the estimated liability related to the warrants is revalued at each reporting period until the earlier of the exercise of the warrants, at which time the liability will be reclassified to stockholders’ equity, or expiration of the warrants. As of December 31, 2014, 8,097,165 of these warrants were outstanding and had a fair value of $5.2 million. The Company revalued the warrant liability at March 31, 2015 using the Black-Scholes Model and recorded a $0.4 million decrease in the fair value as a gain in the revaluation of contingent warrant liabilities line of our condensed consolidated statements of comprehensive loss. The decrease in liability is due primarily to the decrease in the remaining term of the warrants, partially offset by the increase in the market price of XOMA’s common stock at March 31, 2015 as compared to December 31, 2014. At March 31, 2015, all of these warrants were outstanding and had a fair value of $4.8 million.

In March 2012, in connection with an underwritten offering, the Company issued five-year warrants to purchase 14,834,577 shares of XOMA’s common stock at an exercise price of $1.76 per share. These warrants contain provisions that are contingent on the occurrence of a change in control, which could conditionally obligate the Company to repurchase the warrants for cash in an amount equal to their fair value using the Black-Scholes Model on the date of such change in control. Due to these provisions, the Company accounts for the warrants issued in March 2012 as a liability at fair value. In addition, the estimated liability related to the warrants is revalued at each reporting period until the earlier of the exercise of the warrants, at which time the liability will be reclassified to stockholders' equity, or expiration of the warrants. The Company revalued the warrant liability at March 31, 2014 using the Black-Scholes Model and recorded a $19.5 million decrease in the fair value as a gain in the revaluation of contingent warrant liabilities line of our condensed consolidated statements of comprehensive loss. At December 31, 2014, warrants to purchase 12,109,418 shares were outstanding and had a fair value of $26.7 million. The Company revalued the warrant liability at March 31, 2015 using the Black-Scholes Model and recorded the $0.3 million increase in the fair value as a loss in the revaluation of contingent warrant liabilities. This increase in liability is due primarily to the increase in the market price of XOMA’s common stock at March 31, 2015 compared to December 31, 2014. At March 31, 2015, 12,109,418 of the warrants were outstanding and had a fair value of $27.0 million. On May 5, 2015, 1,470,000 of these warrants were exercised in a cashless exercise resulting in an issuance of 785,192 shares.

In February 2010, in connection with an underwritten offering, the Company issued five-year warrants to purchase 1,260,000 shares of XOMA’s common stock at an exercise price of $10.50 per share. The warrants contain provisions that are contingent on the occurrence of a change in control, which could conditionally obligate the Company to repurchase the warrants for cash in an amount equal to their fair value using the Black-Scholes Model on the date of such change in control. Due to these provisions, the Company accounted for the warrants as liabilities at fair value. At December 31, 2014, all of these warrants were outstanding and their fair value was de minimis. As of March 31 2015, all of these warrants expired unexercised.

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XOMA CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(unaudited)

4.	Collaborative and Other Agreements

Servier

In December 2010, the Company entered into a license and collaboration agreement (“Collaboration Agreement”) with Servier, to jointly develop and commercialize gevokizumab in multiple indications. Under the terms of the agreement, Servier has worldwide rights to cardiovascular disease and diabetes indications and rights outside the United States and Japan to all other indications, including NIU, Behçet’s disease uveitis and other inflammatory and oncology indications. Under this agreement, Servier will fund all activities to advance the global clinical development and future commercialization of gevokizumab in cardiovascular-related diseases and diabetes. Also, Servier funded the first $50 million of gevokizumab global clinical development and Chemistry, Manufacturing and Controls expenses related to the three pivotal clinical trials under the EYEGUARD program. All remaining expenses related to these three pivotal clinical trials are shared equally between Servier and the Company. For the three months ended March 31, 2015 and 2014, the Company recorded revenue of $0.5 million and $0.9 million from this Collaboration Agreement, respectively.

On January 9, 2015, concurrent with a loan amendment (see Note 6), the Company and Servier entered into Amendment No. 2 to the Collaboration Agreement (“Collaboration Amendment”). Under the Collaboration Agreement, the Company was eligible to receive up to approximately $433 million in the aggregate in milestone payments, most of which are denominated in Euros, if the Company re-acquires cardiovascular and/or diabetes rights for use in the United States, and approximately $770 million in aggregate milestone payments if the Company does not re-acquire those rights. Under the Collaboration Amendment, the Company would be eligible to receive up to $415 million in the aggregate in milestone payments in the event the Company re-acquires the cardiovascular and/or diabetes rights for use in the United States and approximately $752 million if the Company does not re-acquire those rights. The milestone reductions are related to a very low prevalence indication of which Servier would not have pursued development had these payments been required. All other terms of the Collaboration Agreement remain unchanged.

Symplmed Pharmaceuticals

On January 26, 2015, Symplmed Pharmaceuticals (“Symplmed”) announced that the FDA approved PRESTALIA® (perindopril arginine and amlodipine) tablets, originally licensed from Servier by XOMA, for the treatment of hypertension. In July 2013, the Company transferred the development and commercialization rights of PRESTALIA to Symplmed. Pursuant to the transfer agreement with Symplmed, the Company is eligible to receive royalties of 3% to 10% on any potential sales of PRESTALIA in the United States.

5.	Fair Value Measurements

Fair value is defined as the exchange price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The Company applies Accounting Standards Codification Topic 820, Fair Value Measurement and Disclosures, (“ASC 820”), which establishes a framework for measuring fair value and a fair value hierarchy that prioritizes the inputs used in valuation techniques. The accounting standard describes a fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the last unobservable, that may be used to measure fair value, which are the following:

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XOMA CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(unaudited)

Level 1 – Observable inputs, such as quoted prices in active markets for identical assets or liabilities.

Level 2 – Observable inputs, either directly or indirectly, other than quoted prices in active markets for similar assets or liabilities, that are not active or other inputs that are not observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities; therefore, requiring an entity to develop its own valuation techniques and assumptions.

The following tables set forth the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis as of March 31, 2015 and December 31, 2014 as follows (in thousands):

	Fair Value Measurements at March 31, 2015 Using
	Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
	(Level 1)		(Level 2)		(Level 3)		Total
Assets:
Money market funds ⁽¹⁾	$	60,073					$	60,073
Foreign exchange options		-		-		-		-
Total	$	60,073	$	-	$	-	$	60,073

Liabilities:
Contingent warrant liabilities	$	-	$	-	$	31,868	$	31,868

	Fair Value Measurements at December 31, 2014 Using
	Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
	(Level 1)		(Level 2)		(Level 3)		Total
Assets:
Money market funds ⁽¹⁾	$	67,569	$	-	$	-	$	67,569
Foreign exchange options		-		6		-		6
Total	$	67,569	$	6	$	-	$	67,575

Liabilities:
Contingent warrant liabilities	$	-	$	-	$	31,828	$	31,828

(1)

Included in cash and cash equivalents

There were no transfers between Level 1 and Level 2 during the three months ended March 31, 2015 and 2014.

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XOMA CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(unaudited)

The estimated fair value of the foreign exchange options as of March 31, 2015 was less than $100. The estimated fair value of the foreign exchange options at March 31, 2015 and December 31, 2014 was determined using readily observable market inputs from actively quoted markets obtained from various third-party data providers. These inputs, such as spot rate, forward rate and volatility have been derived from readily observable market data, meeting the criteria for Level 2 in the fair value hierarchy.

The estimated fair value of the contingent warrant liabilities at March 31, 2015 and December 31, 2014 was determined using the Black-Scholes Model, which requires inputs such as the expected term of the warrants, volatility and risk-free interest rate. These inputs are subjective and generally require analysis and judgment to develop. The Company’s common stock price represents a significant input that affects sensitivity in the valuation of the warrants. The change in the fair value is recorded as a gain or loss in the revaluation of contingent warrant liability line of the consolidated statements of comprehensive loss.

The estimated fair value of the contingent warrant liabilities was estimated using the following range of assumptions at March 31 2015 and December 31, 2014:

	March 31, 2015			December 31, 2014

Expected volatility		73.9% - 74.8	%		69.6% - 72.9	%
Risk-free interest rate		0.55	%		0.03% - 0.67	%
Expected term	1.69 - 1.94 years			0.09 - 2.19 years

The following table provides a summary of changes in the fair value of the Company’s Level 3 financial liabilities for the three months ended March 31, 2015 (in thousands):

	Three Months Ended March 31,
	2015		2014
Beginning balance	$	31,828	$	69,869
Reclassification of contingent warrant liability to equity upon exercise of warrants		-		(2,525	)
Net increase (decrease) in estimated fair value of contingent warrant liabilities upon revaluation		40		(20,002	)
Ending balance	$	31,868	$	47,342

The fair value of the Company’s outstanding debt is estimated based on market interest rates. The carrying amount and the estimated fair value of the Company’s outstanding debt at March 31, 2015 and December 31, 2014 are as follows (in thousands):

	March 31, 2015				December 31, 2014
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Outstanding debt	$	47,189	$	47,668	$	35,308	$	36,461

6.	Long-Term Debt and Other Financings

Novartis Note

In May 2005, the Company executed a secured note agreement with Novartis (then Chiron Corporation), which is due and payable in full in June 2015. Under the note agreement, the Company borrowed semi-annually to fund up to 75% of the Company’s research and development and commercialization costs under its collaboration arrangement with Novartis, not to exceed $50 million in aggregate principal amount. Interest on the principal amount of the loan accrues at six-month LIBOR plus 2%, which was equal to 2.35% at March 31, 2015. At the Company’s election, the semi-annual interest payments can be added to the outstanding principal amount, in lieu of a cash payment, as long as the aggregate principal amount does not exceed $50 million. The Company has made this election for all interest payments thus far. Loans under the note agreement are secured by the Company’s interest in its collaboration with Novartis, including any payments owed to it thereunder.

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XOMA CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(unaudited)

As of March 31, 2015 and December 31, 2014, the outstanding principal balance under this note agreement was $13.4 million and included in interest bearing obligations – current in the accompanying condensed consolidated balance sheets. Pursuant to the terms of the arrangement as restructured in November 2008, the Company will not make any additional borrowings under the Novartis note.

Servier Loan

In December 2010, in connection with the license and collaboration agreement entered into with Servier, the Company executed a loan agreement with Servier (the “Servier Loan Agreement”), which provided for an advance of up to €15.0 million. The loan was fully funded in January 2011, with the proceeds converting to approximately $19.5 million. The loan is secured by an interest in XOMA’s intellectual property rights to all gevokizumab indications worldwide, excluding certain rights in the U.S. and Japan. Interest is calculated at a floating rate based on a Euro Inter-Bank Offered Rate (“EURIBOR”) and subject to a cap. The interest rate is reset semi-annually in January and July of each year. The interest rate for the initial interest period was 3.22% and has been reset semi-annually ranging from 2.31% to 3.83%. Interest for the six-month period from mid-January 2015 through mid-July 2015 was reset to 2.16%. Interest is payable semi-annually. In January 2015, the Company paid $0.2 million in accrued interest to Servier.

On January 9, 2015, Servier and the Company entered into Amendment No. 2 (“Loan Amendment”) to the Servier Loan Agreement initially entered into on December 30, 2010 and subsequently amended by a Consent, Transfer, Assumption and Amendment Agreement entered into as of August 12, 2013. The Loan Amendment extended the maturity date of the loan from January 13, 2016 to three tranches of principal due as follows: €3.0 million to be repaid on January 15, 2016, €5.0 million to be repaid on January 15, 2017, and €7.0 million to be repaid on January 15, 2018. All other terms of the Loan Agreement remain unchanged. The loan will be immediately due and payable upon certain customary events of default. The outstanding principal balance under this loan was $16.3 million and $18.2 million, using a euro to US dollar exchange Rate of 1.085 and 1.216, as of March 31, 2015 and December 31, 2014, respectively. The Company recorded unrealized foreign exchange gains of $1.9 million for the three months ended March 31, 2015, related to the re-measurement of the loan. There was an immaterial re-measurement of the loan for the three months ended March 31, 2014.

The Company determined that the Loan Amendment resulted in a loan modification. In connection with the Loan Amendment, the Company incurred debt issuance costs of approximately $6,000 that were included in interest expense for the three months ended March 31, 2015.

Upon issuance, the loan had a stated interest rate lower than the market rate based on comparable loans held by similar companies, which represents additional value to the Company. The Company recorded this additional value as a discount to the face value of the loan amount, at its fair value of $8.9 million. The fair value of this discount, which was determined using a discounted cash flow model, represents the differential between the stated terms and rates of the loan, and market rates. Based on the association of the loan with the collaboration arrangement, the Company recorded the offset to this discount as deferred revenue.

The loan discount is amortized to interest expense under the effective interest method over the remaining life of the loan. The loan discount balance at the time of the Loan Amendment was $1.6 million, which is being amortized over the remaining term of the Loan Amendment. The Company recorded non-cash interest expense resulting from the amortization of the loan discount of $0.2 million and $0.5 million for the three months ended March 31, 2015 and 2014, respectively. At March 31, 2015 and December 31, 2014, the net carrying value of the loan was $14.7 million and $16.2 million, respectively. For the three months ended March 31, 2015, the Company recorded an unrealized foreign exchange gain of $0.2 million related to the re-measurement of the loan discount. There was an immaterial re-measurement of the loan discount for the three months ended March 31, 2014.

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XOMA CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(unaudited)

The Company believes that realization of the benefit and the associated deferred revenue is contingent on the loan remaining outstanding over the remaining contractual term of the loan. If the Company were to stop providing service under the collaboration arrangement and the arrangement is terminated, the maturity date of the loan would be accelerated and a portion of measured benefit would not be realized. As the realization of the benefit is contingent, in part, on the provision of future services, the Company is recognizing the deferred revenue over the expected remaining life of the loan. The deferred revenue is amortized under the effective interest method. For the three months ended March 31, 2015 and 2014, the Company recorded related non-cash revenue of $0.2 million and $0.5 million, respectively.

General Electric Capital Corporation (“GECC”) Term Loan

In December 2011, the Company entered into a loan agreement (the “GECC Loan Agreement”) with GECC, under which GECC agreed to make a term loan in an aggregate principal amount of $10.0 million (the “Term Loan”) to the Company, and upon execution of the GECC Loan Agreement, GECC funded the Term Loan.

In connection with the GECC Loan Agreement, the Company issued to GECC unregistered warrants that entitle GECC to purchase up to an aggregate of 263,158 unregistered shares of XOMA common stock at an exercise price equal to $1.14 per share. These warrants were exercisable immediately upon issuance and have a five-year term expiring in December 2016.

In connection with a September 27, 2012 amendment of the GECC Loan Agreement, the Company issued to GECC unregistered stock purchase warrants, which entitle GECC to purchase up to an aggregate of 39,346 shares of XOMA common stock at an exercise price equal to $3.54 per share. These warrants were exercisable immediately upon issuance and have a five-year term expiring in September 2017.

The Company allocated the aggregate initial proceeds of the GECC Term Loan between the warrants and the debt obligation based on their relative fair values. The fair value of the warrants issued to GECC was determined using the Black-Scholes Model. The fair value of the warrants with the GECC Loan Agreement and the subsequent September 27, 2012 amendment had fair values of $0.2 million and $0.1 million, respectively, and were recorded as a discount to the debt obligation which was amortized over the term of the loan using the effective interest method. The warrants are classified in permanent equity on the condensed consolidated balance sheets.

The GECC Term Loan was paid in full on February 27, 2015 when Hercules Technology Growth Capital, Inc. and the Company, entered into a loan and security agreement (the “Hercules Term Loan”), under which the Company borrowed $20.0 million. The Company used a portion of the proceeds under the Hercules Term Loan to repay GECC’s outstanding principle balance, final payment fee, prepayment fee, and accrued interest totaling $5.5 million and plans to use the remaining proceeds for general corporate purposes. A loss on extinguishment of $0.4 million from the payoff of the GECC Term Loan was recognized as interest expense during the three months ended March 31, 2015.

Hercules Term Loan

On February 27, 2015, the Company entered into the Hercules Term Loan as described in the section above. The Hercules Term Loan has a variable interest rate that is the greater of either (i) 9.40% plus the prime rate as reported from time to time in The Wall Street Journal minus 7.25%, and (ii) 9.40%. The payments under the Hercules Term Loan are interest only until one month prior to the Amortization Date, defined as July 1, 2016, which will be extended to October 1, 2016, if the Company achieves certain clinical milestones on or before July 1, 2016. The interest only period will be followed by equal monthly payments of principal and interest amortized over a 30-month schedule through the scheduled maturity date of September 1, 2018. As security for its obligations under the Hercules Term Loan, the Company granted a security interest in substantially all of its existing and after-acquired assets, excluding its intellectual property assets.

If the Company prepays the loan prior to the loan maturity date, it will pay Hercules a prepayment charge, based on a prepayment fee equal to 3.00% of the amount prepaid, if the prepayment occurs in any of the first 12 months following the closing date, 2.00% of the amount prepaid, if the prepayment occurs after 12 months from the closing date but prior to 24 months from the closing date, and 1.00% of the amount prepaid if the prepayment occurs after 24 months from the closing date. The Hercules Term Loan includes customary affirmative and restrictive covenants, but does not include any financial maintenance covenants, and also includes standard events of default, including payment defaults. Upon the occurrence of an event of default, a default interest rate of an additional 5% may be applied to the outstanding loan balances, and Hercules may declare all outstanding obligations immediately due and payable and take such other actions as set forth in the Hercules Loan Agreement.

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XOMA CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(unaudited)

The Company incurred debt issuance costs of $0.5 million in connection with the Hercules Term Loan. The Company will be required to pay a final payment fee equal to $1.2 million on the maturity date, or such earlier date as the term loan is paid in full. The debt issuance costs and final payment fee are being amortized and accreted, respectively, to interest expense over the term of the term loan using the effective interest method.

In connection with the Hercules Term Loan, the Company issued unregistered warrants that entitle Hercules to purchase up to an aggregate of 181,268 unregistered shares of XOMA common stock at an exercise price equal to $3.31 per share. These warrants were exercisable immediately and have a five-year term expiring in February 2020. The Company allocated the aggregate proceeds of the Hercules Term Loan between the warrants and the debt obligation. The fair value of the warrants issued to Hercules of $0.5 million was determined using the Black-Scholes Model and was recorded as a discount to the debt obligation. The debt discount is being amortized over the term of the loan using the effective interest method. The warrants are classified in permanent equity on the condensed consolidated balance sheets.

The Company evaluated the Hercules Term Loan in accordance with accounting guidance for derivatives and determined there was de minimis value to the identified derivative features of the loan.

As of March 31, 2015, the outstanding principal balance of the Hercules Term Loan was $20.0 million.

Aggregate future principal, final payment fees and discounts of the Company’s total interest bearing obligations - long-term as of March 31, 2015 are as follows (in thousands):

Nine months ending December 31, 2015	$	15,140
Year ended 2016		9,037
Year ended 2017		14,659
Year ended 2018		17,843
		56,679
Less: Interest, final payment fee and discount		(9,490	)
		47,189
Less current portion		(15,605	)
	$	31,584

Interest Expense

Amortization of debt issuance costs and discounts are included in interest expense. Interest expense in the condensed consolidated statements of comprehensive loss for the three months ended March 31, 2015 and 2014 relates to the following debt instruments (in thousands):

	Three Months Ended March 31,
	2015		2014

GECC term loan	$	548	$	448
Servier loan		255		587
Hercules loan		234		-
Novartis note		78		77
Other		-		13
Total interest expense	$	1,115	$	1,125

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XOMA CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(unaudited)

7.	Commitments and Contingencies

Collaborative Agreements, Royalties and Milestone Payments

The Company is obligated to pay royalties, ranging from 0.5% to 5% of the selling price of certain licensed components and up to 40% of any sublicense fees to various universities and other research institutions based on future sales or licensing of products that incorporate certain products and technologies developed by those institutions.

In addition, the Company has committed to make potential future “milestone” payments to third parties as part of licensing and development programs. Payments under these agreements become due and payable only upon the achievement of certain developmental, regulatory and/or commercial milestones. Because it is uncertain if and when these milestones will be achieved, such contingencies, aggregating up to $77.3 million (assuming one product per contract meets all milestones events) have not been recorded on the accompanying condensed consolidated balance sheets. The Company is unable to determine precisely when and if payment obligations under the agreements will become due as these obligations are based on milestone events, the achievement of which is subject to a significant number of risks and uncertainties.

Leases

As of March 31, 2015, the Company leased administrative and research facilities, and office equipment under operating leases expiring on various dates through April 2023. These leases require the Company to pay taxes, insurance, maintenance and minimum lease payments. Total rental expense, including other costs required under the Company’s leases, was approximately $0.9 million for the three months ended March 31, 2015 and 2014. Rental expense based on leases allowing for escalated rent payments are recognized on a straight-line basis. At the expiration of the lease, the Company is required to restore certain of its leased property to certain conditions in place at the time of lease inception. The Company believes these costs will not be material to its operations.

8.	Stock-based Compensation

In the first quarter of 2015, the Board of Directors of the Company approved grants under the Company’s Long Term Incentive Plan for stock options to purchase an aggregate of 1,322,528 shares and an aggregate of 1,401,652 restricted stock units (“RSUs”) to certain employees of the Company. The stock options vest monthly over four years, and the RSUs vest annually over three years, in equal increments.

The Company recognizes compensation expense for all stock-based payment awards made to the Company’s employees, consultants and directors based on estimated fair values. Compensation expense is recognized from the grant date to the earlier of the retirement-eligible date or the vesting date. The valuation of stock option awards is determined at the date of grant using the Black-Scholes Model. This model requires inputs such as the expected term of the option, expected volatility and risk-free interest rate. To establish an estimate of expected term, the Company considers the vesting period and contractual period of the award and its historical experience of stock option exercises, post-vesting cancellations and volatility. The estimate of expected volatility is based on the Company’s historical volatility. The risk-free rate is based on the yield available on U.S. Treasury zero-coupon issues. The forfeiture rate impacts the amount of aggregate compensation for both stock options and RSUs. To establish an estimate of forfeiture rate, the Company considers its historical experience of option forfeitures and terminations.

The fair value of the stock options granted was estimated based on the following weighted average assumptions for three months ended March 31, 2015 and 2014:

	Three Months Ended March 31,
	2015			2014
Dividend yield		0	%		0	%
Expected volatility		82	%		94	%
Risk-free interest rate		1.34	%		1.73	%
Expected term	5.6 years			5.6 years

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XOMA CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(unaudited)

Stock option activity for the three months ended March 31, 2015 was as follows:

	Options			Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Life (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2015		7,702,309		$	8.15
Granted		1,322,528			3.82
Exercised		(65,815	)		1.55
Forfeited, expired or cancelled		(620,440	)		25.65
Outstanding at March 31, 2015		8,338,582		$	6.22		7.50	$	3,174
Vested and expected to vest at March 31, 2015		7,928,331		$	6.30		7.41	$	3,131
Exercisable at March 31, 2015		4,621,508		$	7.52		6.34	$	2,409

The valuation of RSUs is determined at the date of grant using the closing stock price.

Unvested RSU activity for the three months ended March 31, 2015 is summarized below:

	Number of Shares			Weighted- Average Grant- Date Fair Value
Unvested balance at January 1, 2015		1,953,879		$	5.46
Granted		1,401,652			3.83
Vested		(802,081	)		5.04
Forfeited		(27,138	)		5.88
Unvested balance at March 31, 2015		2,526,312		$	4.69

The following table shows allocated stock-based compensation expense included in the condensed consolidated statements of comprehensive loss for the three months ended March 31, 2015 and 2014 (in thousands):

	Three Months Ended March 31,
	2015		2014
Research and development	$	2,196	$	2,406
Selling, general and administrative		1,469		1,518
Total stock-based compensation expense	$	3,665	$	3,924

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ITEM 2.

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Forward Looking Statements

This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, or the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act, which are subject to the “safe harbor” created by those sections. Forward-looking statements are based on our management’s beliefs and assumptions and on information currently available to them. In some cases you can identify forward-looking statements by words such as “may,” “will,” “should,” “could,” “would,” “expects,” “plans,” “anticipates,” “believes,” “estimates,” “projects,” “predicts,” “potential” and similar expressions intended to identify forward-looking statements. Examples of these statements include, but are not limited to, statements regarding: the implications of interim or final results of our clinical trials, the progress of our research programs, including clinical testing, the extent to which our issued and pending patents may protect our products and technology, our ability to identify new product candidates, the potential of such product candidates to lead to the development of commercial products, our anticipated timing for initiation or completion of our clinical trials for any of our product candidates, our future operating expenses, our future losses, our future expenditures for research and development, and the sufficiency of our cash resources. Our actual results could differ materially from those anticipated in these forward-looking statements for many reasons, including the risks faced by us and described in Part II, Item 1A of this Quarterly Report on Form 10-Q and our other filings with the SEC. You should not place undue reliance on these forward-looking statements, which apply only as of the date of this Quarterly Report on Form 10-Q. You should read this Quarterly Report on Form 10-Q completely and with the understanding that our actual future results may be materially different from those we expect. Except as required by law, we assume no obligation to update these forward-looking statements, whether as a result of new information, future events or otherwise.

The following discussion and analysis should be read in conjunction with the unaudited financial statements and notes thereto included in Part I, Item 1 of this Quarterly Report on Form 10-Q and with the audited consolidated financial statements and related notes thereto included as part of our Annual Report on Form 10-K for the year ended December 31, 2014.

Overview

XOMA Corporation (“XOMA”), a Delaware corporation, discovers and develops innovative antibody-based therapeutics. Several of our antibodies have unique properties due to their interaction at allosteric sites on specific protein rather than the orthosteric, or active, sites. The compounds are designed to either enhance or diminish the protein’s activity as desired. We believe allosteric-modulating antibodies may be more selective or offer a safety advantage in certain disease indications when compared to more traditional modes of action.

Our lead product candidate, gevokizumab, is a proprietary potent, humanized allosteric-modulating monoclonal antibody that binds to the inflammatory cytokine interleukin-1 beta (“IL-1 beta”). We believe that by targeting IL-1 beta, gevokizumab has the potential to address the underlying inflammatory causes of a wide range of diseases that have been identified as having unmet medical needs.

Together with our development partner, Servier, a leading independent French pharmaceutical research company, we initiated three pivotal clinical trials evaluating gevokizumab for the treatment of non-infectious intermediate, posterior or pan-uveitis (“NIU”) and Behçet’s disease uveitis. We are responsible for all of the clinical study sites in the United States, and Servier is responsible for all of the clinical study sites outside of the United States. These studies are known as the EYEGUARD™ program, which includes EYEGUARD-A (patients with active NIU), EYEGUARD-B (patients with Behçet’s disease uveitis outside of the United States), EYEGUARD-C (patients with a history of NIU currently controlled with systemic treatment).

Our strategy is to pursue Behçet’s disease uveitis as our first indication for gevokizumab in the United States. Upon the successful completion of Servier’s EYEGUARD-B study, we intend to meet with the U.S. Food and Drug Administration (“FDA” or “the Agency”) to review the Phase 3 EYEGUARD-B data together with the data from the two Behçet’s disease uveitis Phase 2 studies conducted independently by XOMA and Servier. We believe the seriousness of this disease and the small patient population warrant consideration for approval based upon positive data from a single pivotal study. There is significant precedence for regulatory approval based upon a single study for indications of similar seriousness and patient populations. Should EYEGUARD-B demonstrate that patients with Behçet’s disease uveitis who receive gevokizumab took considerably longer to exacerbate than the placebo-treated patients during the tapering of administered steroids, we believe we will be in a position to begin the Biologics License Application (“BLA”) submission process.

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In September 2014, we opened the EYEGUARD-US supplemental gevokizumab clinical study of Behçet’s disease uveitis to patients in the United States. Data from the supplemental EYEGUARD-US study may be used in one of several ways. It may not be required for the initial BLA submission so that it merely provides further information related to U.S. physicians’ and patients’ experiences with gevokizumab. It may be required for the FDA’s review of our submission but for informational purposes without being considered a pivotal study. In this case, the study would be unmasked at a predetermined time when we are in a position to submit the BLA. Finally, it may be required as a second pivotal study in order for the FDA to accept our submission. We have designed the EYEGUARD-US study in a manner intended to fulfill whatever directive we are given by the FDA.

In addition to the NIU clinical trials, we are studying gevokizumab in pyoderma gangrenosum (“PG”), a rare ulcerative skin disease that is a specific indication under the umbrella of diseases known as neutrophilic dermatoses. Patients experience painful expanding skin ulcers that have a significant impact on their quality of life. Approximately 50 to 70 percent of the PG patient population have an underlying systemic condition, while the remainder is idiopathic (unknown cause). The most prevalent underlying conditions are ulcerative colitis and Crohn’s disease. The prognosis for PG is linked directly to the patient’s response to therapy for the underlying disease. Physicians currently treat patients with systemic therapies that are approved for the underlying disease and with topical therapies applied directly to the ulcers, yet published literature suggests that, on average, current therapies can take six months to stop the ulcers from expanding and over eleven months to heal. The U.S. Department of Health and Human Services’ National Institutes of Health’s Office of Rare Disease Research lists PG as occurring in about one per 100,000 people. Claims data compiled over the past three years indicate the number of diagnosed PG patients in the U.S. ranges between 11,000 and 14,000 annually.

Based upon what we believe are compelling data from our pilot study in patients with PG, we initiated a Phase 3 clinical program. Final comments from the FDA were received in the third quarter of 2014, and we initiated the first Phase 3 study in October 2014. The Phase 3 PG program includes two double-blind, placebo-controlled clinical studies, each of which is designed to enroll 58 patients with active PG to receive gevokizumab 60 mg or placebo dosed subcutaneously once monthly, in addition to their current treatment regimen of low-dose corticosteroids and/or immunosuppressants. The primary endpoint is the complete closure of the PG target ulcer determined at Day 126 with confirmation of complete closure a minimum of two weeks later on or after Day 140.

Published literature indicates approximately 50% of patients with PG will experience a recurrence within two to three years. To follow the patients enrolled in our pilot study, we designed an extension study that allows the pilot study patients the opportunity to receive further treatment if they experience new ulcers and allows us to capture information on how gevokizumab performs with successive treatments. Four of the six patients from our pilot study entered the extension study; three of whom were fully healed during the initial study, and one patient who had an ulcer which, was fully healed at Day 56, but reopened after an injury. To date, three of the four patients enrolled in the extension study have received additional gevokizumab therapy for PG. One patient recurred at 7.5 months and upon receiving additional gevokizumab therapy obtained 100% ulcer closure prior to Day 56. One patient recurred at 7 months and after additional gevokizumab therapy obtained 100% ulcer closure by Day 84. The patient who had initially healed but whose ulcer reopened after an injury continued receiving therapy and obtained 100% ulcer closure. One patient has not received additional gevokizumab therapy as the condition has not recurred more than one year following initial gevokizumab treatment. All four patients continue to be enrolled in the extension study and will be followed for up to 92 weeks.

We also have an active gevokizumab Proof-of-Concept (“POC”) development program to identify other illness for late-stage development. Two studies are being conducted in collaboration with the U.S. National Institutes of Health (“NIH”). The National Eye Institute (“NEI”) is conducting a gevokizumab study in patients with non-infectious anterior scleritis. The North Shore-Long Island Jewish Health System in collaboration with the National Institute on Deafness and Other Communication Disorders (“NIDCD”) are conducting a gevokizumab clinical study in patients with inflammatory autoimmune inner ear disease.

Previously, we conducted POC trials in moderate-to-severe inflammatory acne and in erosive osteoarthritis of the hand (“EOA”). We have decided not to further pursue the acne indication. The EOA results led to our decision not to pursue Phase 3 testing in the broad EOA population, although we continue to review the data to determine if there is a subgroup of the EOA population that could benefit from gevokizumab therapy.

Gevokizumab has been generally well tolerated across all of our clinical studies. In both the acne and EOA studies, there were no drug-related serious adverse events reported. The most common adverse events were headache, pain, arthralgia, urinary tract infections, upper respiratory tract infections and pneumonia, and they were comparable between gevokizumab and placebo.

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Separately, Servier instituted its own active development program for gevokizumab beyond the NIU and Behçet’s disease uveitis Phase 3 program. In 2012, Servier initiated a Phase 2 gevokizumab study in patients with acute coronary syndrome, a cardiovascular disease within the cardiometabolic field where it has world-wide rights. In 2013, Servier began testing gevokizumab in a variety of POC studies, including polymyositis/dermatomyositis, Schnitzler syndrome, and giant cell arteritis. Servier has indicated these are the first studies in an extensive multi-indication exploratory program it expects to conduct. On April 1, 2015, Servier announced it had initiated a 370-patient Phase 2 study of gevokizumab in patients with diabetic nephropathy.

Our proprietary pipeline includes classes of allosteric modulating antibodies that activate, sensitize or deactivate the insulin receptor in vivo, which we have named XOMA Metabolic or XMet. Insulin is the primary hormone for lowering blood glucose levels. Abnormal increases in insulin secretion can lead to profound hypoglycemia (low blood sugar), a state that may result in significant morbidities, including cerebral damage and epilepsy. In some instances, profound hypoglycemia can result in fatality. There are three programs in the XMet portfolio, XMetD, which is designed to deactivate the insulin receptor, XMetA, which is designed to activate the insulin receptor, and XMetS, which is designed to sensitize the insulin receptor when in an insulin resistant state. These programs are highly novel as the antibodies bind to different sites on the insulin receptor than currently marketed drugs. This portfolio of antibodies represents potential new therapeutic approaches to the treatment of several rare diseases that have insulin involvement and diabetes.

The lead compound from our XMetD program, XOMA 358, is a fully human monoclonal allosteric modulating antibody that binds to insulin receptors and attenuates insulin action. It is designed to negatively modulate the insulin receptor and its downstream signaling capabilities. We launched clinical development activities for XOMA 358 in October 2014, with the first patient dosed in our Phase 1 safety and tolerability study. The Phase 1 study was successful, and data from the study was presented at ENDO in March 2015. We intend to investigate this compound as a novel treatment for non-drug-induced, endogenous hyperinsulinemic hypoglycemia (low blood glucose caused by excessive insulin produced by the body). A therapy that safely and effectively mitigates insulin-induced hypoglycemia has the potential to address a significant unmet therapeutic need for certain rare medical conditions associated with hyperinsulinism.

We have developed these and other antibodies using some or all of our ADAPT™ antibody discovery and development platform, our ModulX™ technologies for generating allosterically modulating antibodies, and our OptimX™ technologies for optimizing biophysical properties of antibodies, including affinity, immunogenicity, stability and manufacturability.

Our biodefense initiatives include XOMA 3AB, a biodefense anti-botulism product candidate comprised of a combination of three antibodies. XOMA 3AB is directed against botulinum toxin serotype A and has been developed through funding from the National Institute of Allergy and Infectious Diseases (“NIAID”), a part of the NIH. A Phase 1 XOMA 3AB trial was completed with no product-related serious adverse events. Should the government choose to acquire XOMA 3AB or other biodefense products in the future, we expect to be able to produce these antibodies through an outside manufacturer.

We also have developed antibody product candidates with premier pharmaceutical companies including Novartis AG (“Novartis”) and Takeda Pharmaceutical Company Limited (“Takeda”).

Significant Developments in the First Quarter of 2015

Servier Loan Amendment

On January 9, 2015, we entered into Amendment No. 2 to our loan agreement with Servier, initially entered into on December 30, 2010, and subsequently amended by a Consent, Transfer, Assumption and Amendment Agreement entered into as of August 12, 2013. Amendment No. 2 modified the maturity date of the loan from January 13, 2016 to three tranches as follows: €3.0 million to be repaid on January 15, 2016, €5.0 million to be repaid on January 15, 2017 and €7.0 million to be repaid on January 15, 2018. All other terms of the Servier Loan Agreement remain unchanged.

Hercules Term Loan

In February 2015, we entered into a loan and security agreement with Hercules Technology Growth Capital, Inc. (the “Hercules Term Loan”), under which we borrowed $20.0 million. We used a portion of the proceeds under the Hercules Term Loan to repay GECC’s outstanding principle balance, final payment fee, prepayment fee, and accrued interest totaling $5.5 million and plan to use the remaining proceeds for general corporate purposes.

XOMA 358

In March 2015, we announced that we successfully completed the Phase 1 clinical study of XOMA 358, a fully human, allosteric monoclonal antibody that inhibits both the binding of insulin to its receptor and downstream insulin signaling, and presented the data at ENDO 2015. XOMA 358 is being evaluated for the treatment of non-drug-induced, endogenous hyperinsulinemic hypoglycemia (low blood glucose caused by excessive insulin produced endogenously).

Licensing

In January 2015, Symplmed announced that the FDA approved PRESTALIA®, originally licensed by us from Servier and later transferred to Symplmed. As a result, we are eligible to receive royalties of 3% to 10% on any potential sales of PRESTALIA in the United States.

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Results of Operations

Revenues

Total revenues for the three months ended March 31, 2015 and 2014, were as follows (in thousands):

	Three Months Ended March 31,				Increase
	2015		2014		(Decrease)
License and collaborative fees	$	263	$	964	$	(701	)
Contract and other		2,388		2,446	$	(58	)
Total revenues	$	2,651	$	3,410	$	(759	)

License and Collaborative Fees

License and collaborative fees include fees and milestone payments related to the out-licensing of our products and technologies. The decrease in license and collaborative fee revenue for the three months ended March 31, 2015, as compared to the same period of 2014, was due primarily to the receipt of a $0.5 million milestone payment relating to an out-licensing arrangement in the first quarter of 2014. The generation of future revenues related to license and other collaborative fees is dependent on our ability to attract new licensees and new collaboration partners to our antibody technologies.

Contract and Other Revenues

Contract and other revenues include agreements where we provide contracted research and development services to our contract and collaboration partners, including Servier and NIAID. Contract and other revenues also include net product sales and royalties. The following table shows the activity in contract and other revenues for the three months ended March 31, 2015 and 2014 (in thousands):

	Three Months Ended March 31,						Increase
	2015			2014			(Decrease)
Servier	$	523		$	884		$	(361	)
NIAID		1,902			1,596			306
Other		(37	)		(34	)		(3	)
Total revenues	$	2,388		$	2,446		$	(58	)

The decrease in revenue from Servier is due primarily to a decrease in reimbursements from Servier under our collaboration agreement. Servier and XOMA will equally share remaining costs related to the three pivotal clinical trials under the EYEGUARD program. This cost sharing agreement will result in recognition of revenue for periods in which our expenditures exceed Servier’s, and recognition of expense for periods in which Servier’s expenditures exceed ours. Our revenue from NIAID increased due to greater activity under our existing NIAID contracts.

We expect total revenue to increase in 2015 as compared with 2014 levels based on anticipated licensing activities.

Research and Development Expenses

Biopharmaceutical development includes a series of steps, including in vitro and in vivo preclinical testing, and Phase 1, 2 and 3 clinical studies in humans. Each of these steps is typically more expensive than the previous step, but actual timing and the cost to us depends on the product being tested, the nature of the potential disease indication and the terms of any collaborative or development arrangements with other companies or entities. After successful conclusion of all of these steps, regulatory filings for approval to market the products must be completed, including approval of manufacturing processes and facilities for the product. Our research and development expenses currently include costs of personnel, supplies, facilities and equipment, consultants, other third-party costs and expenses related to preclinical and clinical testing.

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Research and development expenses were $20.0 million for the three months ended March 31, 2015, compared with $21.5 million for the same period in 2014. The decrease of $1.5 million was primarily due to a decrease of $3.0 million in external manufacturing costs, partially offset by an increase of $1.5 million in clinical trial costs primarily driven by the initiation of our global Phase 3 PG program and the Phase 1 study in XOMA 358.

Salaries and related personnel costs are a significant component of research and development expenses. We recorded $9.5 million in research and development salaries and employee-related expenses for the three months ended March 31, 2015, as compared with $9.2 million for the same period in 2014.

Our research and development activities can be divided into earlier-stage programs and later-stage programs. Earlier-stage programs include molecular biology, process development, pilot-scale production and preclinical testing. Later-stage programs include clinical testing, regulatory affairs and manufacturing clinical supplies. The costs associated with these programs are summarized below (in thousands):

	Three Months Ended March 31,				Increase
	2015		2014		(Decrease)
Earlier stage programs	$	5,773	$	10,927	$	(5,154	)
Later stage programs		14,231		10,619		3,612
Total	$	20,004	$	21,546	$	(1,542	)

Our research and development activities can also be divided into those related to our internal projects and those projects related to collaborative and contract arrangements. The costs related to internal projects versus collaborative and contract arrangements are summarized below (in thousands):

	Three Months Ended March 31,				Increase
	2015		2014		(Decrease)
Internal projects	$	13,664	$	14,969	$	(1,305	)
Collaborative and contract arrangements		6,340		6,577		(237	)
Total	$	20,004	$	21,546	$	(1,542	)

For the three months ended March 31, 2015, the gevokizumab program, for which we incurred the largest amount of expense, accounted for more than 50% but less than 60% of our total research and development expenses. A second development program, XMet, accounted for more than 20% but less than 30% of our total research and development expenses, and a third development program, NIAID, accounted for more than 10% but less than 20% of our total research and development expenses. All remaining development programs accounted for less than 10% of our total research and development expenses for the three months ended March 31, 2015. For the three months ended March 31, 2014, the gevokizumab program, for which we incurred the largest amount of expense, accounted for more than 40% but less than 50% of our total research and development expenses. A second development program, XMet, accounted for more than 20% but less than 30% of our total research and development expenses. Other preclinical programs aggregate to more than 10% but less than 20% of our total research and development expenses. All remaining development programs accounted for less than 10% of our total research and development expenses for the three months ended March 31, 2014.

We expect our research and development spending during the remainder of 2015 to be comparable to 2014 primarily due to our ongoing global Phase 3 clinical program for gevokizumab for the NIU indications, our Phase 3 clinical program for gevokizumab for the PG indication, our ongoing gevokizumab Phase 2 POC program, and the continued development of our XMet program.

Future research and development spending also may be impacted by potential new licensing or collaboration arrangements, as well as the termination of existing agreements. Beyond this, the scope and magnitude of future research and development expenses are difficult to predict at this time.

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Selling, General and Administrative Expenses

Selling, general and administrative expenses include salaries and related personnel costs, facilities costs and professional fees. Selling, general and administrative expenses were $5.2 million for the three months ended March 31, 2015, compared with $5.3 million for the same period in 2014.

Other Income (Expense)

Interest Expense

Amortization of debt issuance costs and discounts are included in interest expense. Interest expense is shown below for the three months ended March 31, 2015 and 2014 (in thousands):

	Three Months Ended March 31,
	2015		2014

GECC term loan	$	548	$	448
Servier loan		255		587
Hercules loan		234		-
Novartis note		78		77
Other		-		13
Total interest expense	$	1,115	$	1,125

Interest expense for the GECC term loan was higher for the three months ended March 31, 2015, as compared with March 31, 2014, due to a loss of $0.4 million that was recorded upon the extinguishment of the debt in February 2015. The loss primarily related to the amortization of the remaining debt issuance costs, final payment fee and loan discount as well as a prepayment penalty. Interest expense related to the Servier loan decreased over the same period by $0.3 million. This was due to the $1.6 million balance of imputed interest remaining at the time of the loan which was amended in January 2015 and is now being amortized over the extended term of the loan.

We expect interest expense will increase during 2015 due to our new term loan with Hercules Growth Capital Inc., which carries a higher principal balance than the GECC term loan.

Other income (expense) primarily consisted of unrealized (losses) gains. The following table shows the activity in other income (expense) for the three months ended March 31, 2015 and 2014 (in thousands):

	Three Months Ended March 31,						Increase
	2015			2014			(Decrease)
Other income (expense)
Unrealized foreign exchange gain (1)	$	1,949		$	66		$	1,883
Realized foreign exchange gain (loss)		56			(47	)		103
Unrealized loss on foreign exchange options		(6	)		(122	)		116
Other		11			13			(2	)
Total other income (expense)	$	2,010		$	(90	)	$	2,100

(1)

Unrealized foreign exchange gain for the three months ended March 31, 2015 and 2014 primarily relates to the re-measurement of the €15 million Servier loan.

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Revaluation of Contingent Warrant Liabilities

In December 2014, in connection with a registered direct offering, we issued two-year warrants to purchase 8,097,165 shares of our common stock at an exercise price of $7.90 per share. These warrants contain provisions that are contingent on the occurrence of a change in control, which could conditionally obligate us to repurchase the warrants for cash in an amount equal to their fair value using the Black-Scholes Model on the date of such change in control. Due to these provisions, we account for the warrants issued in December 2014 as a liability at fair value. In addition, the estimated liability related to the warrants is revalued at each reporting period until the earlier of the exercise of the warrants, at which time the liability will be reclassified to stockholders’ equity, or expiration of the warrants. At December 31, 2014, 8,097,165 of these warrants were outstanding and had a fair value of $5.2 million. We revalued the warrant liability at March 31, 2015 using the Black-Scholes Model and recorded a $0.4 million decrease in the fair value as a gain in the revaluation of contingent warrant liabilities. The decrease in liability is due primarily to the decrease in the remaining term of the warrants, partially offset by the increase in the market price of our common stock at March 31, 2015 as compared to December 31, 2014. At March 31, 2015, all of the warrants were outstanding and had a fair value of $4.8 million.

In March 2012, in connection with an underwritten offering, we issued five-year warrants to purchase 14,834,577 shares of XOMA’s common stock at an exercise price of $1.76 per share. These warrants contain provisions that are contingent on the occurrence of a change in control, which would conditionally obligate us to repurchase the warrants for cash in an amount equal to their fair value using the Black-Scholes Model on the date of such change in control. Due to these provisions, we are required to account for the warrants issued in March 2012 as a liability at fair value. In addition, the estimated liability related to the warrants is required to be revalued at each reporting period until the earlier of the exercise of the warrants, at which time the liability will be reclassified to stockholders' equity, or expiration of the warrants. We revalued the warrant liability at March 31, 2014 using the Black-Scholes Model and recorded a $19.5 million decrease in the fair value as a gain in the revaluation of contingent warrant liabilities. At December 31, 2014, warrants to purchase 12,109,418 shares were outstanding and had a fair value of $26.7 million. We revalued the warrant liability at March 31, 2015 using the Black-Scholes Model and recorded the $0.3 million increase in the fair value as a loss in the revaluation of contingent warrant liabilities in the accompanying condensed consolidated statements of comprehensive loss. This increase in liability is due primarily to the increase in the market price of XOMA’s common stock at March 31, 2015 compared to December 31, 2014. At March 31, 2015, 12,109,418 of the warrants were outstanding and had a fair value of $27.0 million. On May 5, 2015, 1,470,000 of these warrants were exercised in a cashless exercise resulting in an issuance of 785,192 shares.

The following table provides a summary of the changes in estimated fair value of contingent warrant liabilities for the three months ended March 31, 2015 and 2014 (in thousands):

	Three Months Ended March 31,
	2015		2014
Beginning balance	$	31,828	$	69,869
Reclassification of contingent warrant liability to equity upon exercise of warrants		-		(2,525	)
Net increase (decrease) in estimated fair value of contingent warrant liabilities upon revaluation		40		(20,002	)
Ending balance	$	31,868	$	47,342

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Liquidity and Capital Resources

The following table summarizes our cash and cash equivalents, our working capital and our cash flow activities for each of the periods presented (in thousands):

	March 31,		December 31,		Increase
	2015		2014		(Decrease)
Cash and cash equivalents	$	67,491	$	78,445	$	(10,954	)
Working Capital	$	46,195	$	47,367	$	(1,172	)

	Three Months Ended March 31,						Increase
	2015			2014			(Decrease)

Cash used in operating activities	$	(24,280	)	$	(28,200	)	$	3,920
Cash used in investing activities		(225	)		(49	)		(176	)
Cash provided by financing activities		13,574			296			13,278
Effect of exchange rate changes on cash		(23	)		-			(23	)
Net decrease in cash and cash equivalents	$	(10,954	)	$	(27,953	)	$	16,999

Cash Used In Operating Activities

The decrease in net cash used in operating activities for the three months ended March 31, 2015 as compared with the same period in 2014 was primarily due to a decrease in research and development spending related to external manufacturing costs in the first quarter of 2015.

Cash Used In Investing Activities

Net cash used in investing activities increased $0.2 million for the three months ended March 31, 2015, as compared with the same period of 2014, due to expenditures for leasehold improvements of $0.2 million during the first quarter of 2015.

Cash Provided by Financing Activities

Net cash provided by financing activities was $13.6 million for the three months ended March 31, 2015, compared with $0.3 million for the same period of 2014. Cash provided by financing activities in the first quarter of 2015 related to proceeds received from the Hercules Term Loan of $20.0 million, partially offset by $6.1 million in principal payments on the GECC Term Loan, and debt issuance costs of $0.5 million.

Hercules Term Loan

The Company and Hercules Technology Growth Capital, Inc. entered into the Hercules Term Loan on February 27, 2015, under which we borrowed $20.0 million. The Hercules Term Loan has a variable interest rate that is the greater of either (i) 9.40% plus the prime rate as reported from time to time in The Wall Street Journal minus 7.25%, and (ii) 9.40%. The payments under the Hercules Term Loan are interest only until one month prior to the Amortization Date, defined as July 1, 2016, which will be extended to October 1, 2016, if we achieve certain clinical milestones on or before July 1, 2016. The interest only period will be followed by equal monthly payments of principal and interest amortized over a 30-month schedule through the scheduled maturity date of September 1, 2018. As security for its obligations under the Hercules Term Loan, we granted a security interest in substantially all of our existing and after-acquired assets, excluding our intellectual property assets. We used a portion of the proceeds under the Hercules Term Loan to repay the outstanding principle balance, final payment fee, prepayment fee, and accrued interest totaling $5.5 million from GECC.

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If we prepay the loan prior to the loan maturity date, we will pay Hercules a prepayment charge, based on a prepayment fee equal to 3.00% of the amount prepaid, if the prepayment occurs in any of the first 12 months following the closing date, 2.00% of the amount prepaid, if the prepayment occurs after 12 months from the closing date but prior to 24 months from the closing date, and 1.00% of the amount prepaid if the prepayment occurs after 24 months from the closing date. The Hercules Term Loan includes customary affirmative and restrictive covenants, but does not include any financial maintenance covenants, and also includes standard events of default, including payment defaults. Upon the occurrence of an event of default, a default interest rate of an additional 5% may be applied to the outstanding loan balances, and Hercules may declare all outstanding obligations immediately due and payable and take such other actions as set forth in the Hercules Loan Agreement.

We incurred debt issuance costs of $0.5 million in connection with the Hercules Term Loan. We will be required to pay a final payment fee equal to $1.2 million on the maturity date, or such earlier date as the term loan is paid in full. The debt issuance costs and final payment fee are being amortized and accreted, respectively, to interest expense over the term of the term loan using the effective interest method.

In connection with the Hercules Term Loan, we issued unregistered warrants that entitle Hercules to purchase up to an aggregate of 181,268 unregistered shares of XOMA common stock at an exercise price equal to $3.31 per share. These warrants were exercisable immediately and have a five-year term expiring in February 2020. We allocated the aggregate proceeds of the Hercules Term Loan between the warrants and the debt obligation. The estimated fair value of the warrants issued to Hercules of $0.5 million was determined using the Black-Scholes Model and was recorded as a discount to the debt obligation. The discount is being amortized over the term of the loan using the effective interest method. The warrants are classified in permanent equity on the condensed consolidated balance sheet.

Aggregate future principal, final payment fees and discounts of our total interest bearing obligations - long-term as of March 31, 2015 are as follows (in thousands):

Nine months ending December 31, 2015	$	15,140
Year ended 2016		9,037
Year ended 2017		14,659
Year ended 2018		17,843
		56,679
Less: Interest, final payment fee and discount		(9,490	)
		47,189
Less current portion		(15,605	)
	$	31,584

* * *

We have incurred significant operating losses and negative cash flows from operations since our inception. At March 31, 2015, we had cash and cash equivalents of $67.5 million, which is available to fund future operations. Taking into account the repayment of our outstanding debt classified within current liabilities on our Consolidated Balance Sheet as of March 31, 2015, we anticipate that we will be required to seek additional equity or debt financing or to increase the level of collaborative revenue to fund operations through at least March 31, 2016. If we are unable to achieve the level of revenues from licensing, development and collaboration agreements and the level of government funding and external financing during 2015, as contemplated in our operating plan, we have plans to implement certain cost cutting actions commencing early in the fourth quarter of 2015 to reduce our working capital requirements. Consistent with the actions we have taken in the past, we will prioritize necessary and appropriate steps to enable the continued operations of the business and preservation of the value of our assets beyond the next twelve months, including but not limited to actions, such as reduced personnel-related costs, additional curtailment of our development activities and other discretionary expenditures that are within our control. These reductions in expenditures, if required, may have an adverse impact on our ability to achieve certain of our planned objectives during 2015. In addition to seeking equity or debt financing, we may seek to access additional capital to support future operations through licensing, partnering or other strategic collaborative arrangements. It is unclear if or when any such transactions will occur, on satisfactory terms or at all.

Our ability to raise additional capital in the equity and debt markets, should we choose to do so, is dependent on a number of factors, including, but not limited to, the market demand for our common stock, which itself is subject to a number of pharmaceutical development and business risks and uncertainties, as well as the uncertainty that we would be able to raise such additional capital at a price or on terms that are favorable to us.

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Critical Accounting Policies

Critical accounting policies are those that require significant judgment and/or estimates by management at the time that the financial statements are prepared such that materially different results might have been reported if other assumptions had been made. We consider certain accounting policies including, but not limited to, those related to revenue recognition, research and development expense, contingent warrant liabilities, and stock-based compensation to be critical policies. There have been no significant changes in our critical accounting policies during the three months ended March 31, 2015, as compared with those previously disclosed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2014, filed with the SEC on March 11, 2015.

Management Change

On March 4, 2015, we announced the retirement of Fred Kurland, as the Company’s Vice President, Finance, Chief Financial Officer and Secretary, effective as of April 3, 2015, and the appointment on February 26, 2015 of Thomas Burns as the Company’s Chief Financial Officer, effective immediately upon Mr. Kurland’s retirement from the Company.

ITEM 3.

QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Interest Rate Risk

We are exposed to market risks in the ordinary course of our business. These risks primarily include risk related to interest rate sensitivities. Our market risks related to interest rate sensitivities at March 31, 2015, have not changed materially from those discussed in Item 7A of our Form 10-K for the year ended December 31, 2014 filed with the SEC.

Foreign Currency Risk

We hold debt, incur expenses, and may be owed milestones denominated in foreign currencies. The amount of debt owed, expenses incurred, or milestones owed to us will be impacted by fluctuations in these foreign currencies. When the U.S. Dollar weakens against foreign currencies, the U.S. Dollar value of the foreign-currency denominated debt, expense, and milestones increases, and when the U.S. Dollar strengthens against these currencies, the U.S. dollar value of the foreign-currency denominated debt, expense, and milestones decreases. Consequently, changes in exchange rates will affect the amount we are required to repay on our €15.0 million loan from Servier and may affect our results of operations. We estimate that a hypothetical 0.01 change the Euro to USD exchange rate could increase or decrease our unrealized gains or losses by approximately $0.2 million.

ITEM 4.

CONTROLS AND PROCEDURES

Evaluation of Controls and Procedures

We have established disclosure controls and procedures, as defined in Rule 13a-15(e) of the Securities Exchange Act of 1934, as amended. Our Chief Executive Officer and our Chief Financial Officer have concluded, based on the evaluation of the effectiveness of our disclosure controls and procedures by our management, with the participation of our Chief Executive Officer and our Chief Financial Officer, as of the end of the period covered by this report, that our disclosure controls and procedures were effective at the reasonable assurance level.

Changes in Internal Control

There have been no changes in our internal controls over financial reporting as defined in Rule 13a-15(f) under the Exchange Act during our most recent fiscal quarter that have materially affected, or are reasonably likely to materially affect, our internal controls over financial reporting.

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PART II -

OTHER INFORMATION

ITEM 1.

LEGAL PROCEEDINGS

None.

ITEM 1A.

RISK FACTORS

This Quarterly Report on Form 10-Q contains forward-looking information based on our current expectations. Because our actual results may differ materially from any forward-looking statements made by or on behalf of us, this section includes a discussion of important factors that could affect our actual future results, including, but not limited to, our revenues, expenses, operating results, cash flows, net loss and loss per share. Additional risks and uncertainties not presently known to us or that we currently deem immaterial may also impair our business operations. You should carefully consider these risk factors, together with all of the other information included in this Quarterly Report on Form 10-Q as well as our other publicly available filings with the U.S. Securities and Exchange Commission, or SEC.

Because our product candidates are still being developed, we will require substantial funds to continue; we cannot be certain that funds will be available, and if they are not available, we may be forced to delay, reduce, or eliminate our product development programs or to take actions that could adversely affect your investment and may not be able to continue operations.

We will need to commit substantial funds to continue development of our product candidates, and we may not be able to obtain sufficient funds on acceptable terms, or at all. If we raise additional funds by issuing equity securities, our stockholders will experience dilution. Any debt financing or additional equity that we raise may contain terms that are not favorable to our stockholders or us. If we raise additional funds through collaboration and licensing arrangements with third parties, we may be required to relinquish some rights to our technologies or our product candidates, grant licenses on terms that are not favorable to us or enter into a collaboration arrangement for a product candidate at an earlier stage of development or for a lesser amount than we might otherwise choose.

Additional funds may not be available when we need them on terms that are acceptable to us, or at all. If adequate funds are not available on a timely basis, we may:

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terminate or delay clinical trials for one or more of our product candidates; reduce or eliminate certain product development efforts or commercialization efforts;

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further reduce our headcount and capital or operating expenditures; or

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curtail our spending on protecting our intellectual property.

We finance our operations primarily through our multiple revenue streams resulting from discovery and development collaborations, biodefense contracts, and the licensing of our antibody technologies, debt and through sales of our common stock.

Based on our cash and cash equivalents of $67.5 million at March 31, 2015, anticipated spending levels, anticipated cash inflows from collaborations, biodefense contracts and licensing transactions, funding availability included under our loan agreements, the proceeds from our equity offerings and other sources of funding that we believe to be available, we anticipate that we will be required to seek additional equity or debt financing or to increase the level or collaborative revenue to fund operations through at least the next 12 months. Any significant revenue shortfalls, increases in planned spending on development programs, more rapid progress of development programs than anticipated, or the initiation of new clinical trials, as well as the unavailability of anticipated sources of funding, could shorten this period or otherwise have a material adverse impact on our ability to finance our continued operations. Progress or setbacks by potentially competing products also may affect our ability to raise new funding on acceptable terms.

We do not know when or whether:

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operations will generate meaningful funds;

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additional agreements for product development funding can be reached;

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strategic alliances can be negotiated; or

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adequate additional financing will be available for us to finance our own development on acceptable terms, or at all.

If adequate funds are not available, we will be required to delay, reduce the scope of, or eliminate one or more of our product development programs and further reduce personnel-related costs.

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We have sustained losses in the past, and we expect to sustain losses in the future.

We have been and are developing numerous product candidates, and as a result have experienced significant losses. As of March 31, 2015, we had an accumulated deficit of $1.1 billion.

For the three months ended March 31, 2015, we had a net loss of approximately $21.7 million, or $0.19 per share of common stock (basic and diluted). For the year ended December 31, 2014, we had a net loss of approximately $38.3 million, or $0.36 per share of common stock, basic and $0.67 per share of common stock, diluted.

Our ability to achieve profitability is dependent in large part on the success of our development programs, obtaining regulatory approval for our product candidates and licensing certain of our preclinical compounds, all of which are uncertain. Our product candidates are still being developed, and we do not know whether we will ever achieve sustained profitability or whether cash flow from future operations will be sufficient to meet our needs.

We are substantially dependent on Servier for the development and commercialization of gevokizumab and for other aspects of our business, and if we are unable to maintain our relationship with Servier, or Servier does not perform under its agreements with us, our business would be harmed significantly.

We have a number of agreements with Servier that are material to the conduct of our business, including:

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In December 2010, we entered into a license and collaboration agreement with Servier, to jointly develop and commercialize gevokizumab in multiple indications. Under the terms of the agreement, Servier has worldwide rights to cardiovascular disease and diabetes indications and rights outside the United States and Japan to all other indications, including Behçet’s disease uveitis and other inflammatory and oncology indications. In late 2011, we announced Servier agreed to include the NIU Phase 3 trials under the terms of the collaboration agreement for Behçet’s disease uveitis. We retain development and commercialization rights for NIU and other inflammatory disease and oncology indications in the United States and Japan and have an option to reacquire rights to cardiovascular disease and diabetes indications from Servier in these territories. Should we exercise this option, we will be required to pay an option fee to Servier and partially reimburse a specified portion of Servier’s incurred development expenses. The agreement contains mutual customary termination rights relating to matters such as material breach by either party. Servier may terminate for safety issues, and we may terminate the agreement, with respect to a particular country or the European Patent Organization (“EPO”) member states, for any challenge to our patent rights in that country or any EPO member state, respectively, by Servier. Servier also has a unilateral right to terminate the agreement for the European Union (“EU”) or for non-EU countries, on a country-by-country basis, or in its entirety, in each case with six months’ notice.

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In December 2010, we entered into a loan agreement with Servier (the “Servier Loan Agreement”), which provides for an advance of up to €15.0 million and was funded fully in January 2011 with the proceeds converting to approximately $19.5 million at the January 13, 2011, Euro-to-U.S.-dollar exchange rate of 1.3020. This loan is secured by an interest in our intellectual property rights to all gevokizumab indications worldwide, excluding the United States and Japan. The loan has a final maturity date in 2016; however, after a specified period prior to final maturity, the loan is required to be repaid (1) at Servier’s option, by applying up to a significant percentage of any milestone or royalty payments owed by Servier under our collaboration agreement and (2) using a significant percentage of any upfront, milestone or royalty payments we receive from any third-party collaboration or development partner for rights to gevokizumab in the United States and/or Japan. In addition, the loan becomes immediately due and payable upon certain customary events of default. At December 31, 2014, the €15.0 million outstanding principal balance under this Servier Loan Agreement would have equaled approximately $18.2 million using the December 31, 2014 Euro-to-U.S.-dollar exchange rate of 1.216.

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On January 9, 2015, Servier and we entered into Amendment No. 2 (“Loan Amendment”). The Servier Loan Agreement was initially entered into on December 30, 2010 and subsequently amended by a Consent, Transfer, Assumption and Amendment Agreement entered into as of August 12, 2013. The Loan Amendment modifies the maturity date of the loan from January 13, 2016 to three tranches due on January 15, 2016, January 15, 2017 and January 15, 2018 and provides that principal shall be repaid as follows: €3.0 million to be repaid on January 13, 2016, €5.0 million to be repaid on January 15, 2017 and €7.0 million to be repaid on January 15, 2018. All other terms of the Loan Agreement remain unchanged, including the interest rate calculations, EURIBOR+2% and the formula for resetting the interest rate on the 15th of January and 15^th of July every six months.

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On January 9, 2015, Servier and we entered into an Amendment No. 2 to the Collaboration Agreement Under the Collaboration Agreement we were eligible to receive up to approximately $433 million in the aggregate in milestone payments, most of which were denominated in Euros, if we re-acquire cardiovascular and/or diabetes rights for use in the United States, and approximately $770 million in aggregate milestone payments if we do not re-acquire those rights. Under the Collaboration Amendment, we would be eligible to receive up to $415 million in the aggregate in milestone payments in the event we re-acquire the cardiovascular and/or diabetes rights for use in the United States and approximately $752 million if we do not re-acquire those rights. The milestone reductions are related to a very low prevalence indication of which Servier would not have pursued development had these payments been required. All other terms of the Collaboration Agreement remain unchanged.

Because Servier is an independent third party, it may be subject to different risks than we are and has significant discretion in, and different criteria for, determining the efforts and resources it will apply related to its agreements with us. Even though we have a collaborative relationship with Servier, our relationship could deteriorate or other circumstances may prevent our relationship with Servier from resulting in successful development of marketable products. If we are not able to maintain our working relationship with Servier, or if Servier does not perform under its agreements with us, our ability to develop and commercialize gevokizumab would be materially and adversely affected.

If our therapeutic product candidates do not receive regulatory approval, neither our third-party collaborators nor we will be able to market them.

Our product candidates (including gevokizumab, XMetA, XMetS, XOMA 358 and XOMA 3AB) cannot be manufactured and marketed in the United States or any other countries without required regulatory approvals. The U.S. government and governments of other countries extensively regulate many aspects of our product candidates, including:

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clinical development and testing;

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manufacturing;

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labeling;

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storage;

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record keeping;

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promotion and marketing; and

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importing and exporting.

In the United States, the FDA regulates pharmaceutical products under the Federal Food, Drug, and Cosmetic Act and other laws, including, in the case of biologics, the Public Health Service Act. At the present time, we believe many of our product candidates (including gevokizumab, XMetA, XMetS, XOMA 358 and XOMA 3AB) will be regulated by the FDA as biologics. Initiation of clinical trials requires approval by health authorities. Clinical trials involve the administration of the investigational new drug to healthy volunteers or to patients under the supervision of a qualified principal investigator. Clinical trials must be conducted in accordance with FDA and International Conference on Harmonization of Technical Requirements for Registration of Pharmaceuticals for Human Use Good Clinical Practices and the European Clinical Trials Directive under protocols that detail the objectives of the study, the parameters to be used to monitor safety and the efficacy criteria to be evaluated. Other national, foreign and local regulations also may apply. The developer of the drug must provide information relating to the characterization and controls of the product before administration to the patients participating in the clinical trials. This requires developing approved assays of the product to test before administration to the patient and during the conduct of the trial. In addition, developers of pharmaceutical products must provide periodic data regarding clinical trials to the FDA and other health authorities, and these health authorities may issue a clinical hold upon a trial if they do not believe, or cannot confirm, that the trial can be conducted without unreasonable risk to the trial participants. We cannot assure you that U.S. and foreign health authorities will not issue a clinical hold with respect to any of our clinical trials in the future.

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The results of the preclinical studies and clinical testing, together with chemistry, manufacturing and controls information, are submitted to the FDA and other health authorities in the form of an NDA for a drug, and in the form of a Biologic License Application (“BLA”) for a biological product, requesting approval to commence commercial sales. In responding to an NDA or BLA, the FDA or foreign health authorities may grant marketing approvals, request additional information or further research, or deny the application if it determines the application does not satisfy its regulatory approval criteria. Regulatory approval of an NDA, BLA, or supplement never is guaranteed, the approval process can take several years, is extremely expensive and can vary substantially based upon the type, complexity, and novelty of the products involved, as well as the target indications. FDA regulations and policies permit applicants to request accelerated or priority review pathways for products intended to treat certain serious or life-threatening illnesses in certain circumstances. If granted by the FDA, these review pathways can provide a shortened timeline to commercialize the product, although the shortened review timeline is often accompanied with additional post-market requirements. Although we may pursue the FDA’s accelerated or priority review programs, we cannot guarantee the FDA will permit us to utilize these pathways or the FDA’s review of our application will not be delayed. Moreover, even if the FDA agrees to an accelerated or priority review of any of our applications, we ultimately may not be able to obtain approval of our application in a timely fashion or at all. The FDA and foreign health authorities have substantial discretion in the drug and biologics approval processes. Despite the time and expense incurred, failure can occur at any stage, and we could encounter problems that cause us to abandon clinical trials or to repeat or perform additional preclinical, clinical or manufacturing-related studies.

Changes in the regulatory approval policy during the development period, changes in, or the enactment of additional regulations or statutes, or changes in regulatory review for each submitted product application may cause delays in the approval or rejection of an application. State regulations may also affect our proposed products.

The FDA and other regulatory agencies have substantial discretion in both the product approval process and manufacturing facility approval process, and as a result of this discretion and uncertainties about outcomes of testing, we cannot predict at what point, or whether, the FDA or other regulatory agencies will be satisfied with our or our collaborators’ submissions or whether the FDA or other regulatory agencies will raise questions that may be material and delay or preclude product approval or manufacturing facility approval. In light of this discretion and the complexities of the scientific, medical and regulatory environment, our interpretation or understanding of the FDA’s or other regulatory agencies’ requirements, guidelines or expectations may prove incorrect, which also could delay further or increase the cost of the approval process. As we accumulate additional clinical data, we will submit it to the FDA and other regulatory agencies, as appropriate, and such data may have a material impact on the approval process.

Given that regulatory review is an interactive and continuous process, we maintain a policy of limiting announcements and comments upon the specific details of regulatory review of our product candidates, subject to our obligations under the securities laws, until definitive action is taken.

We have received negative results from certain of our clinical trials, and we face uncertain results of other clinical trials of our product candidates.

Drug development has inherent risk, and we are required to demonstrate through adequate and well-controlled clinical trials that our product candidates are effective, with a favorable benefit-risk profile for use in their target profiles before we can seek regulatory approvals for their commercial use. It is possible we may never receive regulatory approval for any of our product candidates. Even if a product candidate receives regulatory approval, the resulting product may not gain market acceptance among physicians, patients, healthcare payors and the medical community. In March 2011, we announced our 421-patient Phase 2b trial of gevokizumab in Type 2 diabetes did not achieve the primary endpoint of reduction in hemoglobin A1c (“HbA1c”) after six monthly treatments with gevokizumab compared to placebo. In June 2011, we announced top-line trial results from our six-month 74-patient Phase 2a trial of gevokizumab in Type 2 diabetes, and there were no differences in glycemic control between the drug and placebo groups as measured by HbA1c levels. In March 2014, we reported that despite early positive results in our gevokizumab proof-of-concept study in patients with erosive osteoarthritis of the hand (“EOA”) and elevated C-reactive protein, the top-line data at Day 168 in that study, as well as data at Day 84 in patients with EOA and non-elevated CRP, were not positive.

Many of our product candidates, including gevokizumab, XMetA, XMetS, XOMA 358 and XOMA 3AB, require significant additional research and development, extensive preclinical studies and clinical trials and regulatory approval prior to any commercial sales. This process is lengthy and expensive, often taking a number of years. As clinical results frequently are susceptible to varying interpretations that may delay, limit or prevent regulatory approvals, the length of time necessary to complete clinical trials and to submit an application for marketing approval for a final decision by a regulatory authority varies significantly. As a result, it is uncertain whether:

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our future filings will be delayed;

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our preclinical and clinical studies will be successful;

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we will be successful in generating viable product candidates to targets;

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we will be able to provide necessary additional data;

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results of future clinical trials will justify further development; or

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we ultimately will achieve regulatory approval for any of these product candidates.

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The timing of the commencement, continuation and completion of clinical trials may be subject to significant delays relating to various causes, including completion of preclinical testing and earlier-stage clinical trials in a timely manner, engaging contract research organizations and other service providers, scheduling conflicts with participating clinicians and clinical institutions, difficulties in identifying and enrolling patients who meet trial eligibility criteria and shortages of available drug supply. Patient enrollment is a function of many factors, including the size of the patient population, the proximity of patients to clinical sites, the eligibility criteria for the trial, the existence of competing clinical trials and the availability of alternative or new treatments. Regardless of the initial size or relative complexity of a clinical trial, the costs of such trial may be higher than expected due to increases in duration or size of the trial, changes in the protocol pursuant to which the trial is being conducted, additional or special requirements of one or more of the healthcare centers where the trial is being conducted, or changes in the regulatory requirements applicable to the trial or in the standards or guidelines for approval of the product candidate being tested or for other unforeseen reasons. In addition, we conduct clinical trials in foreign countries, which may subject us to further delays and expenses as a result of increased drug shipment costs, additional regulatory requirements and the engagement of foreign clinical research organizations, as well as expose us to risks associated with foreign currency transactions insofar as we might desire to use U.S. Dollars to make contract payments denominated in the foreign currency where the trial is being conducted.

All of our product candidates are prone to the risks of failure inherent in drug development. Preclinical studies may not yield results that satisfactorily support the filing of an Investigational New Drug application (“IND”) (or a foreign equivalent) with respect to our product candidates. Even if these applications would be or have been filed with respect to our product candidates, the results of preclinical studies do not necessarily predict the results of clinical trials. Similarly, early stage clinical trials in healthy volunteers do not predict the results of later-stage clinical trials, including the safety and efficacy profiles of any particular product candidates. In addition, there can be no assurance the design of our clinical trials is focused on appropriate indications, patient populations, dosing regimens or other variables that will result in obtaining the desired efficacy data to support regulatory approval to commercialize the drug. Moreover, FDA officials or foreign regulatory agency officials may question the integrity of our data or otherwise subject our clinical trials to additional scrutiny when the clinical trials are conducted by principal investigators who serve, or previously served, as scientific advisors or consultants to us and receive cash compensation in connection with such services. Preclinical and clinical data can also be interpreted in different ways. Accordingly, FDA officials or officials from foreign regulatory authorities could interpret the data differently than we or our collaboration or development partners do, which could delay, limit or prevent regulatory approval.

Administering any of our products or potential products may produce undesirable side effects, also known as adverse effects. Toxicities and adverse effects that we have observed in preclinical studies for some compounds in a particular research and development program may occur in preclinical studies or clinical trials of other compounds from the same program. Such toxicities or adverse effects could delay or prevent the filing of an IND (or a foreign equivalent) with respect to such products or potential products or cause us to cease clinical trials with respect to any drug candidate. In clinical trials, administering any of our products or product candidates to humans may produce adverse effects. These adverse effects could interrupt, delay or halt clinical trials of our products and product candidates and could result in the FDA or other regulatory authorities denying approval of our products or product candidates for any or all targeted indications. The FDA, other regulatory authorities, our collaboration or development partners or we may suspend or terminate clinical trials at any time. Even if one or more of our product candidates were approved for sale, the occurrence of even a limited number of toxicities or adverse effects when used in large populations may cause the FDA or other regulatory authorities to impose restrictions on, or stop, the further marketing of such drugs. Indications of potential adverse effects or toxicities that may occur in clinical trials and that we believe are not significant during the course of such clinical trials may actually turn out later to constitute serious adverse effects or toxicities when a drug has been used in large populations or for extended periods of time. Any failure or significant delay in completing preclinical studies or clinical trials for our product candidates, or in receiving and maintaining regulatory approval for the sale of any drugs resulting from our product candidates, may severely harm our reputation and business.

We rely on third parties to provide services in connection with our product candidate development and manufacturing programs. The inadequate performance by or loss of any of these service providers could affect our product candidate development.

Several third parties provide services in connection with our preclinical and clinical development programs, including in vitro and in vivo studies, assay and reagent development, immunohistochemistry, toxicology, pharmacokinetics, clinical trial support, manufacturing and other outsourced activities. If these service providers do not adequately perform the services for which we have contracted or cease to continue operations and we are not able to find a replacement provider quickly or we lose information or items associated with our product candidates, our development programs may be delayed.

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We may not obtain orphan drug exclusivity, or we may not receive the full benefit of orphan drug exclusivity even if we obtain such exclusivity.

The FDA has awarded orphan drug status to gevokizumab for the treatment of non-infectious, intermediate, posterior or pan uveitis, chronic non-infectious anterior uveitis, pyoderma gangrenosum and Behçet’s uveitis. Under the Orphan Drug Act, the first company to receive FDA approval for another drug for the designated orphan drug indication will obtain seven years of marketing exclusivity, during which time the FDA may not approve another company’s application for the same orphan indication unless the FDA concludes that the later drug is safer, more effective or makes a major contribution to patient care. Even though we have obtained orphan drug designation for certain indications for gevokizumab and even if we obtain orphan drug designation for our future product candidates or other indications, due to the uncertainties associated with developing pharmaceutical products, we may not be the first to obtain marketing approval for any particular orphan indication, or we may not obtain approval for an indication for which we have obtained orphan drug designation. Further, even if we obtain orphan drug exclusivity for a product, that exclusivity may not protect the product effectively from competition because different drugs can be approved for the same condition. Even after an orphan drug is approved, the FDA can subsequently approve the same drug for another condition if the FDA concludes that the later drug is safer, more effective or makes a major contribution to patient care. Orphan drug designation neither shortens the development time or regulatory review time of a drug, nor gives the drug any advantage in the regulatory review or approval process.

Even after FDA approval, a product may be subject to additional testing or significant marketing restrictions, its approval may be withdrawn or it may be removed voluntarily from the market.

Even if we receive regulatory approval for our product candidates, we will be subject to ongoing regulatory oversight and review by the FDA and other regulatory entities. The FDA, the European Medicines Agency (“EMA”) or another regulatory agency may impose, as a condition of the approval, ongoing requirements for post-approval studies or post-approval obligations, including additional research and development and clinical trials, and the FDA, EMA or other regulatory agency subsequently may withdraw approval based on these additional trials.

Even for approved products, the FDA, EMA or other regulatory agency may impose significant restrictions on the indicated uses, conditions for use, labeling, advertising, promotion, marketing and/or production of such product. In addition, the labeling, packaging, adverse event reporting, storage, advertising, promotion and record-keeping for our products are subject to extensive regulatory requirements.

Furthermore, a marketing approval of a product may be withdrawn by the FDA, the EMA or another regulatory agency or such a product may be withdrawn voluntarily by the company marketing it based, for example, on subsequently arising safety concerns. The FDA, EMA and other agencies also may impose various civil or criminal sanctions for failure to comply with regulatory requirements, including withdrawal of product approval.

We may issue additional equity securities and thereby materially and adversely affect the price of our common stock.

We are authorized to issue, without stockholder approval, 1,000,000 shares of preferred stock, of which none were issued and outstanding as of May 7, 2015, which may give other stockholders dividend, conversion, voting, and liquidation rights, among other rights, which may be superior to the rights of holders of our common stock. In addition, we are authorized to issue, generally without stockholder approval, up to 277,333,332 shares of common stock, of which 117,815,481 were issued and outstanding as of May 5, 2015. If we issue additional equity securities, the price of our common stock may be materially and adversely affected.

As part of our fundraising efforts, we offer securities through underwritten public offerings from time to time. In 2013, we completed two such offerings, one in August 2013 where we sold 8,736,187 shares of our common stock at a public offering price of $3.62 per share and the other in December 2013, where we sold 10,925,000 shares of our common stock at a public offering price of $5.25 per share. In 2014, we completed a registered direct offering where we sold 8,097,165 shares of our common stock at an offering price of $4.94 per share.

In addition, funding from collaboration partners and others has in the past and may in the future involve issuance by us of our common stock. We cannot be certain how the purchase price of such shares, the relevant market price or premium, if any, will be determined or when such determinations will be made.

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Any issuance by us of equity securities, whether through an underwritten public offering, an at the market offering, a private placement, in connection with a collaboration or otherwise could result in dilution in the value of our issued and outstanding shares, and a decrease in the trading price of our common stock.

Our share price may be volatile, and there may not be an active trading market for our common stock.

There can be no assurance the market price of our common stock will not decline below its present market price or there will be an active trading market for our common stock. The market prices of biotechnology companies have been and are likely to continue to be highly volatile. Fluctuations in our operating results and general market conditions for biotechnology stocks could have a significant impact on the volatility of our common stock price. We have experienced significant volatility in the price of our common stock. From January 1, 2015, through May 5, 2015, the share price of our common stock has ranged from a high of $4.33 to a low of $2.92. Factors contributing to such volatility include, but are not limited to:

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results of preclinical studies and clinical trials;

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information relating to the safety or efficacy of products or product candidates;

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developments regarding regulatory filings;

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announcements of new collaborations;

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failure to enter into collaborations;

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developments in existing collaborations;

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our funding requirements and the terms of our financing arrangements;

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technological innovations or new indications for our therapeutic products and product candidates;

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introduction of new products or technologies by us or our competitors;

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sales and estimated or forecasted sales of products for which we receive royalties, if any;

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government regulations;

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developments in patent or other proprietary rights;

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the number of shares issued and outstanding;

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the number of shares trading on an average trading day;

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announcements regarding other participants in the biotechnology and pharmaceutical industries; and

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market speculation regarding any of the foregoing.

As a public company in the United States, we are subject to the Sarbanes-Oxley Act. We have determined our disclosure controls and procedures and our internal control over financial reporting are effective. We can provide no assurance that we will, at all times, in the future be able to report that our internal controls over financial reporting are effective.

Companies that file reports with the Securities and Exchange Commission, or the SEC, including us, are subject to the requirements of Section 404 of the Sarbanes-Oxley Act of 2002. Section 404 requires management to establish and maintain a system of internal control over financial reporting, and annual reports on Form 10-K filed under the Securities Exchange Act of 1934, as amended, or the Exchange Act, must contain a report from management assessing the effectiveness of our internal control over financial reporting. Ensuring we have adequate internal financial and accounting controls and procedures in place to produce accurate financial statements on a timely basis is a time-consuming effort that needs to be re-evaluated frequently. Failure on our part to have effective internal financial and accounting controls would cause our financial reporting to be unreliable, could have a material adverse effect on our business, operating results, and financial condition, and could cause the trading price of our common stock to fall.

We are subject to various state and federal healthcare related laws and regulations that may impact the commercialization of our product candidates or could subject us to significant fines and penalties.

Our operations may be directly or indirectly subject to various state and federal healthcare laws, including, without limitation, the federal Anti-Kickback Statute, the federal False Claims Act and state and federal privacy and security laws. These laws may impact, among other things, the commercial operations for any of our product candidates that may be approved for commercial sale.

The federal Anti-Kickback Statute prohibits persons from knowingly and willfully soliciting, offering, receiving or providing remuneration, directly or indirectly, in exchange for or to induce either the referral of an individual, or the furnishing or arranging for a good or service for which payment may be made under a federal healthcare program, such as the Medicare and Medicaid programs. Several courts have interpreted the statute’s intent requirement to mean that if any one purpose of an arrangement involving remuneration is to induce referrals of federal healthcare covered business, the statute has been violated. The Anti-Kickback Statute is broad and prohibits many arrangements and practices that are lawful in businesses outside of the healthcare industry. Penalties for violations of the federal Anti-Kickback Statute include criminal penalties and civil sanctions such as fines, penalties, imprisonment and possible exclusion from Medicare, Medicaid and other federal healthcare programs.

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The federal False Claims Act prohibits persons from knowingly filing, or causing to be filed, a false claim to, or the knowing use of false statements to obtain payment from the federal government. Suits filed under the False Claims Act, known as “qui tam” actions, can be brought by any individual on behalf of the government and such individuals, commonly known as “whistleblowers”, may share in any amounts paid by the entity to the government in fines or settlement. The filing of qui tam actions has caused a number of pharmaceutical, medical device and other healthcare companies to have to defend a False Claims Act action. When an entity is determined to have violated the False Claims Act, it may be required to pay up to three times the actual damages sustained by the government, plus civil penalties for each separate false claim. Various states also have enacted laws modeled after the federal False Claims Act.

The Federal Health Insurance Portability and Accountability Act of 1996 (“HIPAA”), created new federal criminal statutes that prohibit executing a scheme to defraud any healthcare benefit program and making false statements relating to healthcare matters. The health care fraud statute prohibits knowingly and willfully executing a scheme to defraud any health care benefit program, including private payors. The false statements statute prohibits knowingly and willfully falsifying, concealing or covering up a material fact or making any materially false, fictitious or fraudulent statement in connection with the delivery of or payment for health care benefits, items or services. HIPAA, as amended by the Health Information Technology and Clinical Health Act (“HITECH”), and its implementing regulations, also impose certain requirements relating to the privacy, security and transmission of individually identifiable health information. We take our obligation to maintain our compliance with these various laws and regulations seriously.

In addition, there has been a recent trend of increased federal and state regulation of payments made to physicians. The Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act of 2010, (collectively, “PPACA”), among other things, imposed new requirements on manufacturers of drugs, devices, biologics and medical supplies for which payment is available under Medicare, Medicaid or the Children’s Health Insurance Program (with certain exceptions) to report annually to the Centers for Medicare & Medicaid Services (“CMS”), information related to payments or other “transfers of value” made to physicians (defined to include doctors, dentists, optometrists, podiatrists and chiropractors) and teaching hospitals, and applicable manufacturers and group purchasing organizations to report annually to CMS ownership and investment interests held by physicians (as defined above) and their immediate family members and payments or other “transfers of value” to such physician owners and their immediate family members. Manufacturers were required to begin data collection on August 1, 2013, and were required to report such data to the government by March 31, 2014, and will be by the 90^thcalendar day of each year thereafter. Failure to submit required information may result in civil monetary penalties of up to an aggregate of $150,000 per year (or up to an aggregate of $1 million per year for “knowing failures”), for all payments, transfers of value or ownership or investment interests not reported in an annual submission.

Many states also have adopted laws similar to each of the federal laws described above, some of which apply to healthcare items or services reimbursed by any source, not only the Medicare and Medicaid programs. In addition, some states have laws that require pharmaceutical companies to comply with the pharmaceutical industry’s voluntary compliance guidelines and the applicable compliance guidance promulgated by the federal government, or otherwise restrict payments that may be made to healthcare providers and other potential referral sources, and to report information related to payments and other transfers of value to physicians and other healthcare providers; and state laws governing the privacy and security of health information in certain circumstances, many of which differ from each other in significant ways and may not have the same effect, thus complicating compliance efforts.

Because of the breadth of these laws, it is possible that some of our business activities could be subject to challenge under one or more of such laws. The PPACA also make several important changes to the federal Anti-Kickback Statute, false claims laws, and health care fraud statute by weakening the intent requirement under the anti-kickback and health care fraud statutes that may make it easier for the government, or whistleblowers to charge such fraud and abuse violations. A person or entity no longer needs to have actual knowledge of this statute or specific intent to violate it. In addition, the PPACA provides that the government may assert that a claim including items or services resulting from a violation of the federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the false claims statutes.

If we are found to be in violation of any of the laws and regulations described above or other applicable state and federal healthcare laws, we may be subject to penalties, including civil and criminal penalties, damages, fines, exclusion from government healthcare reimbursement programs and the curtailment or restructuring of our operations, any of which could have a material adverse effect on our business and results of operations.

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Certain of our technologies are in-licensed from third parties, so our capabilities using them are restricted and subject to additional risks.

We license technologies from third parties. These technologies include but are not limited to phage display technologies licensed to us in connection with our bacterial cell expression technology licensing program and antibody products. However, our use of these technologies is limited by certain contractual provisions in the licenses relating to them, and although we have obtained numerous licenses, intellectual property rights in the area of phage display are particularly complex. If the owners of the patent rights underlying the technologies that we license do not properly maintain or enforce those patents, our competitive position and business prospects could be harmed. Our success will depend in part on the ability of our licensors to obtain, maintain and enforce our in-licensed intellectual property. Our licensors may not be successful in prosecuting the patent applications to which we have licenses, or our licensors may fail to maintain existing patents. They may determine not to pursue litigation against other companies that are infringing these patents, or they may pursue such litigation less aggressively than we would. Our licensors also may seek to terminate our license, which could cause us to lose the right to use the licensed intellectual property and adversely affect our ability to commercialize our technologies, products or services.

We do not know whether there will be, or will continue to be, a viable market for the products in which we have an ownership or royalty interest.

Even if products in which we have an interest receive approval in the future, they may not be accepted in the marketplace. In addition, we or our collaborators or licensees may experience difficulties in launching new products, many of which are novel and based on technologies that are unfamiliar to the healthcare community. We have no assurance healthcare providers and patients will accept such products, if developed. For example, physicians and/or patients may not accept a product for a particular indication because it has been biologically derived (and not discovered and developed by more traditional means) or if no biologically derived products are currently in widespread use in that indication. Similarly, physicians may not accept a product if they believe other products to be more effective or more cost effective or are more comfortable prescribing other products.

Safety concerns also may arise in the course of on-going clinical trials or patient treatment as a result of adverse events or reactions. For example, in February 2009, the EMA announced it had recommended suspension of the marketing authorization of RAPTIVA in the EU, and EMD Serono Inc., the company that marketed RAPTIVA in Canada (“EMD Serono”) announced that in consultation with Health Canada, the Canadian health authority (“Health Canada”), it would suspend marketing of RAPTIVA in Canada. In March 2009, Merck Serono Australia Pty Ltd, the company that marketed RAPTIVA in Australia (“Merck Serono Australia”), following a recommendation from the Therapeutic Goods Administration, the Australian health authority (“TGA”), announced it was withdrawing RAPTIVA from the Australian market. In the second quarter of 2009, Genentech announced and carried out a phased voluntary withdrawal of RAPTIVA from the U.S. market, based on the association of RAPTIVA with an increased risk of progressive multifocal leukoencephalopathy (“PML”), and sales of the product ceased.

Furthermore, government agencies, as well as private organizations involved in healthcare, from time to time publish guidelines or recommendations to healthcare providers and patients. Such guidelines or recommendations can be very influential and may adversely affect product usage directly (for example, by recommending a decreased dosage of a product in conjunction with a concomitant therapy or a government entity withdrawing its recommendation to screen blood donations for certain viruses) or indirectly (for example, by recommending a competitive product over our product). Consequently, we do not know if physicians or patients will adopt or use our products for their approved indications.

Even approved and marketed products are subject to risks relating to changes in the market for such products. Introduction or increased availability of generic versions of products can alter the market acceptance of branded products. In addition, unforeseen safety issues may arise at any time, regardless of the length of time a product has been on the market.

In addition to our agreements with Servier, our agreements with other third parties, many of which are significant to our business, expose us to numerous risks.

Our financial resources and our marketing experience and expertise are limited. Consequently, our ability to develop products successfully depends, to a large extent, upon securing the financial resources and/or marketing capabilities of third parties other than Servier. For example:

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In March 2004, we announced we had agreed to collaborate with Chiron Corporation (now Novartis) for the development and commercialization of antibody products for the treatment of cancer. In April 2005, we announced the initiation of clinical testing of the first product candidate out of the collaboration, HCD122, an anti-CD40 antibody, in patients with advanced chronic lymphocytic leukemia. In October 2005, we announced the initiation of the second clinical trial of HCD122 in patients with multiple myeloma. In November 2008, we announced the restructuring of this product development collaboration, which involved six development programs including CD40 and prolactin receptor antibody programs. In exchange for cash and debt reduction on our existing loan facility with Novartis, Novartis received control over the CD40 and prolactin receptor antibody programs, as well as the right to expand the development of these programs into additional indications outside of oncology. Novartis has initiated clinical studies to test CFZ533, an anti-CD40 antibody arising from its collaboration with XOMA, in de novo renal transplantation and in Primary Sjögren's Syndrome. Novartis has returned control of the prolactin receptor antibody program to us, and we are evaluating options for its continued development.

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In March 2005, we entered into a contract with the National Institute of Allergy and Infectious Diseases (“NIAID”) to produce three monoclonal antibodies designed to protect U.S. citizens against the harmful effects of botulinum neurotoxin used in bioterrorism. In July 2006, we entered into an additional contract with NIAID for the development of an appropriate formulation for human administration of these three antibodies in a single injection. In September 2008, we announced we had been awarded an additional contract with NIAID to support our on-going development of drug candidates toward clinical trials in the treatment of botulism poisoning. In October 2011, we announced we had been awarded an additional contract with NIAID to develop broad-spectrum antitoxins for the treatment of human botulism poisoning.

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We have licensed our bacterial cell expression technology, a set of enabling technologies used to discover and screen, as well as develop and manufacture, recombinant antibodies and other proteins for commercial purposes, to over 60 companies. As of March 9, 2015, we were aware of three products manufactured using this technology that have received FDA approval: Genentech’s LUCENTIS® (ranibizumab injection) for treatment of neovascular wet age-related macular degeneration, Macular Edema Following Vein Occulsion, Diabetic Macular Edema, and Diabetic Retinopathy in patients with Diabetic Macular Edema; UCB’s CIMZIA® (certolizumab pegol) for treatment of Crohn’s disease and rheumatoid arthritis; and Pfizer’s TRUMENBA®, a meningococcal group B vaccine. In the third quarter of 2009, we sold our LUCENTIS royalty interest to Genentech. In the third quarter of 2010, we sold our CIMZIA royalty interest. We anticipate receiving a fraction of a percentage royalty on sales of TRUMENBA.

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In August 2012, Servier and we announced an agreement with Boehringer Ingelheim to transfer XOMA's technology and processes for the validation of our technology and processes in preparation for the commercial manufacture of gevokizumab. Boehringer Ingelheim has completed GMP runs with successful biological comparability, including all process validation batches of the XOMA processes. Boehringer Ingelheim is making preparations for the production of gevokizumab commercial batches at its facility in Biberach, Germany.

Because our collaborators, licensees, suppliers and contractors are independent third parties, they may be subject to different risks than we are and have significant discretion in, and different criteria for, determining the efforts and resources they will apply related to their agreements with us. If these collaborators, licensees, suppliers and contractors do not successfully perform the functions for which they are responsible, we may not have the capabilities, resources or rights to do so on our own.

We do not know whether we, our collaborators or licensees will successfully develop and market any of the products that are or may become the subject of any of our collaboration or licensing arrangements. In some cases these arrangements provide for funding solely by our collaborators or licensees, and in other cases, all of the funding for certain projects and a significant portion of the funding for other projects is to be provided by our collaborator or licensee, and we provide the balance of the funding. Even when we have a collaborative relationship, other circumstances may prevent it from resulting in successful development of marketable products. In addition, third-party arrangements such as ours also increase uncertainties in the related decision-making processes and resulting progress under the arrangements, as we and our collaborators or licensees may reach different conclusions, or support different paths forward, based on the same information, particularly when large amounts of technical data are involved. Furthermore, our contracts with NIAID contain numerous standard terms and conditions provided for in the applicable Federal acquisition regulations and customary in many government contracts, some of which could allow the U.S. government to exercise certain rights under the technology developed under these contracts. Uncertainty exists as to whether we will be able to comply with these terms and conditions in a timely manner, if at all. In addition, we are uncertain as to the extent of NIAID’s demands and the flexibility that will be granted to us in meeting those demands. Under our contract with NIAID, we invoice using NIH provisional rates, and these are subject to future audits at the discretion of NIAID’s contracting office. These audits can result in an adjustment to revenue previously reported, which potentially could be significant.

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Although we continue to evaluate additional strategic alliances and potential partnerships, we do not know whether or when any such alliances or partnerships will be entered into.

Products and technologies of other companies may render some or all of our products and product candidates noncompetitive or obsolete.

Developments by others may render our products, product candidates, or technologies obsolete or uncompetitive. Technologies developed and utilized by the biotechnology and pharmaceutical industries are changing continuously and substantially. Competition in antibody-based technologies is intense and is expected to increase in the future as a number of established biotechnology firms and large chemical and pharmaceutical companies advance in these fields. Many of these competitors may be able to develop products and processes competitive with or superior to our own for many reasons, including that they may have:

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significantly greater financial resources;

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larger research and development and marketing staffs;

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larger production facilities;

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entered into arrangements with, or acquired, biotechnology companies to enhance their capabilities; or

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extensive experience in preclinical testing and human clinical trials.

These factors may enable others to develop products and processes competitive with or superior to our own or those of our collaborators. In addition, a significant amount of research in biotechnology is being carried out in universities and other non-profit research organizations. These entities are becoming increasingly interested in the commercial value of their work and may become more aggressive in seeking patent protection and licensing arrangements. Furthermore, many companies and universities tend not to announce or disclose important discoveries or development programs until their patent position is secure or, for other reasons, later; as a result, we may not be able to track development of competitive products, particularly at the early stages. Positive or negative developments in connection with a potentially competing product may have an adverse impact on our ability to raise additional funding on acceptable terms. For example, if another product is perceived to have a competitive advantage, or another product’s failure is perceived to increase the likelihood that our product will fail, then investors may choose not to invest in us on terms we would accept or at all.

The examples below pertain to competitive events in the market that we review quarterly yet are not intended to be representative of all existing competitive events.

Gevokizumab

We, in collaboration with Servier, are developing gevokizumab, a potent monoclonal antibody with unique allosteric modulating properties that binds strongly to interleukin-1 beta (IL-1 beta), a pro-inflammatory cytokine. In binding to IL-1 beta, gevokizumab inhibits the activation of the IL-1 receptor, thereby modulating the cellular signaling events that produce inflammation. Certain other companies are developing products based on the same or similar therapeutic targets as gevokizumab. The efficacy and safety profile of gevokizumab relative to these potential competitors is unknown.

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Novartis markets and is developing ILARIS® (canakinumab, ACZ885), a fully human monoclonal antibody that selectively binds to and neutralizes IL-1 beta. Since 2009, canakinumab has been approved in over 50 countries for the treatment of children and adults suffering from Cryopyrin-Associated Periodic Syndrome (“CAPS”). The product is indicated in the U.S. for the treatment of CAPS in patients over four years of age, including familial cold auto-inflammatory syndrome (“FCAS”) and Muckle-Wells syndrome (“MWS”), as well as for active systemic juvenile idiopathic arthritis (“SJIA”) in patients aged two years and older. In the EU, canakinumab is indicated for the treatment of FCAS, MWS, neonatal-onset multisystem inflammatory disease (“NOMID”)/ chronic infantile neurological cutaneous articular syndrome (“CINCA syndrome”), severe forms of FCAS/familial cold urticarial (“FCU”) presenting with signs and symptoms beyond cold-induced urticaria skin rash, for the symptomatic treatment of adults with frequent gouty arthritis attacks, and for SJIA in patients aged two years and above who have responded inadequately to previous therapy with non-steroidal anti-inflammatory drugs and systemic corticosteroids. In Japan, canakinumab is indicated for the treatment of CAPS and associated autoinflammatory symptoms, including FCAS, MWS and NOMID. Novartis also is pursuing other diseases in which IL-1 beta may play a prominent role, such as: systemic secondary prevention of cardiovascular events; hereditary periodic fever (familial Mediterranean fever (“FMF”)); chronic obstructive pulmonary disorder (“COPD”); osteoarthritis; urticarial vasculitis; tumor necrosis factor receptor-associated periodic syndrome (“TRAPS”); xerophthalmia; Schnitzler syndrome; polymyalgia rheumatica; hyperimmunoglobulinemia D (hyper-IgD) and periodic fever syndrome (“HIDS”); and abdominal aortic aneurysm (“AAA”).

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Regeneron markets and is developing ARCALYSTt® (rilonacept), an interleukin-1 blocker currently indicated in the U.S. for the treatment of CAPS, including FCAS and MWS in adults and children 12 and older. Rilonacept is also approved, but not marketed, in the EU for the same patient population.

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In 2008, Swedish Orphan Biovitrum obtained from Amgen the global exclusive rights to Kineret® (anakinra) for rheumatoid arthritis as currently indicated in its label. In November 2009, the agreement regarding Swedish Orphan Biovitrum’s Kineret license was expanded to include certain orphan indications. Kineret is an IL-1 receptor antagonist (IL-1ra) that has been evaluated in multiple IL- 1-mediated diseases, including indications we are considering for gevokizumab. In addition to other on-going studies, a proof-of concept clinical trial investigating Kineret in patients with a certain type of myocardial infarction, or heart attack, has been completed in the United Kingdom. In January 2013, Biovitrum obtained FDA approval for NOMID, a severe form of CAPS. In November 2013, Kineret was approved by the European Commission for the treatment of CAPS. Shanghai CP Guojian Pharmaceutical is developing an injectable formulation of recombinant human IL-1Ra, presumed to be a follow-on biologic version of anakinra, for the potential treatment of rheumatoid arthritis. In February 2010, an NDA was filed with the China Food and Drug Administration (“SFDA”); in January 2012, supplemental materials were required by the SFDA to conclude the review.

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The following companies have completed or are conducting or planning Phase 3 clinical trials of the following products for the treatment of noninfectious intermediate, posterior or pan-uveitis: AbbVie - HUMIRA® (adalimumab); Novartis - Myfortic® (mycophenalate sodium); Santen Pharmaceutical Co., Ltd. - Opsiria® (intravitreal sirolimus); pSivida Corp. - Fluocinolone Acetonide Intravitreal; and Allergan - Ozurdex® (dexamethasone).

In May 2014, AbbVie announced the FDA had granted HUMIRA® (adalimumab) orphan drug designation for the treatment of noninfectious intermediate, posterior, or pan-uveitis, or chronic non-infectious anterior uveitis.

In April 2014, Santen announced SAKURA 1, the first of two Global Phase 3 studies in patients with non-infectious posterior segment uveitis, met its primary endpoint.

XOMA 3AB

We also are developing XOMA 3AB, a combination, or cocktail, of antibodies designed to neutralize the most potent of botulinum toxins. Other companies are developing other products targeting botulism poisoning, and these products may prove more effective than XOMA 3AB. We are aware:

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Emergent Biosolutions Inc. has a contract with the U.S. Department of Health & Human Services, expected to be worth $423.0 million, to manufacture and supply an equine heptavalent botulism anti-toxin. In March 2013, the product was approved by the FDA.

Manufacturing risks and inefficiencies may adversely affect our ability to manufacture products for ourselves or others.

To the extent we continue to provide manufacturing services for our own benefit or to third parties, we are subject to manufacturing risks. Additionally, unanticipated fluctuations in customer requirements may lead to manufacturing inefficiencies, which if significant could lead to an impairment of our long-lived assets or restructuring activities. We must utilize our manufacturing operations in compliance with regulatory requirements, in sufficient quantities and on a timely basis, while maintaining acceptable product quality and manufacturing costs. Additional resources and changes in our manufacturing processes may be required for each new product, product modification or customer or to meet changing regulatory or third-party requirements, and this work may not be completed successfully or efficiently.

Manufacturing and quality problems may arise in the future to the extent we continue to perform these manufacturing activities for our own benefit or for third parties. Consequently, our development goals or milestones may not be achieved in a timely manner or at a commercially reasonable cost, or at all. In addition, to the extent we continue to make investments to improve our manufacturing operations, our efforts may not yield the improvements that we expect.

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Failure of our products to meet current Good Manufacturing Practices standards may subject us to delays in regulatory approval and penalties for noncompliance.

Our contract manufacturers are required to produce our clinical product candidates under current Good Manufacturing Practices (“cGMP”) to meet acceptable standards for use in our clinical trials and for commercial sale, as applicable. If such standards change, the ability of contract manufacturers to produce our product candidates on the schedule we require for our clinical trials or to meet commercial requirements may be affected. In addition, contract manufacturers may not perform their obligations under their agreements with us or may discontinue their business before the time required by us to successfully produce clinical and commercial supplies of our product candidates.

We and our contract manufacturers are subject to pre-approval inspections and periodic unannounced inspections by the FDA and corresponding state and foreign authorities to ensure strict compliance with cGMP and other applicable government regulations and corresponding foreign standards. We do not have control over a third-party manufacturer’s compliance with these regulations and standards. Any difficulties or delays in our contractors’ manufacturing and supply of our product candidates or any failure of our contractors to maintain compliance with the applicable regulations and standards could increase our costs, cause us to lose revenue, make us postpone or cancel clinical trials, prevent or delay regulatory approval by the FDA and corresponding state and foreign authorities, prevent the import and/or export of our product candidates, or cause any of our product candidates that may be approved for commercial sale to be recalled or withdrawn.

Because many of the companies with which we do business also are in the biotechnology sector, the volatility of that sector can affect us indirectly as well as directly.

As a biotechnology company that collaborates with other biotechnology companies, the same factors that affect us directly also can adversely impact us indirectly by affecting the ability of our collaborators, partners and others with whom we do business to meet their obligations to us and reduce our ability to realize the value of the consideration provided to us by these other companies.

For example, in connection with our licensing transactions, we have in the past and may in the future agree to accept equity securities of the licensee in payment of license fees. The future value of these or any other shares we receive is subject both to market risks affecting our ability to realize the value of these shares and more generally to the business and other risks to which the issuer of these shares may be subject.

As we do more business internationally, we will be subject to additional political, economic and regulatory uncertainties.

We may not be able to operate successfully in any foreign market. We believe that because the pharmaceutical industry is global in nature, international activities will be a significant part of our future business activities and when and if we are able to generate income, a substantial portion of that income will be derived from product sales and other activities outside the United States. Foreign regulatory agencies often establish standards different from those in the United States, and an inability to obtain foreign regulatory approvals on a timely basis could put us at a competitive disadvantage or make it uneconomical to proceed with a product or product candidate’s development. International sales may be limited or disrupted by:

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imposition of government controls;

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export license requirements;

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political or economic instability;

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trade restrictions;

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changes in tariffs;

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restrictions on repatriating profits;

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exchange rate fluctuations; and

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withholding and other taxation.

We are subject to foreign currency exchange rate risks.

We are subject to foreign currency exchange rate risks because substantially all of our revenues and operating expenses are paid in U.S. Dollars, but we incur certain expenses, as well as interest and principal obligations with respect to our loan from Servier in Euros. To the extent the U.S. Dollar declines in value against the Euro, the effective cost of servicing our Euro-denominated debt will be higher. Changes in the exchange rate result in foreign currency gains or losses. Although we have managed some of our exposure to changes in foreign currency exchange rates by entering into foreign exchange option contracts, there can be no assurance foreign currency fluctuations will not have a material adverse effect on our business, financial condition, liquidity or results of operations. In addition, our foreign exchange option contracts are re-valued at each financial reporting period, which also may result in gains or losses from time to time.

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If we and our partners are unable to protect our intellectual property, in particular our patent protection for our principal products, product candidates and processes, and prevent its use of the covered subject matter by third parties, our ability to compete in the market will be harmed, and we may not realize our profit potential.

We rely on patent protection, as well as a combination of copyright, trade secret, and trademark laws to protect our proprietary technology and prevent others from duplicating our products or product candidates. However, these means may afford only limited protection and may not:

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prevent our competitors from duplicating our products;

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prevent our competitors from gaining access to our proprietary information and technology; or

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permit us to gain or maintain a competitive advantage.

Because of the length of time and the expense associated with bringing new products to the marketplace, we and our collaboration and development partners hold and are in the process of applying for a number of patents in the United States and abroad to protect our product candidates and important processes and also have obtained or have the right to obtain exclusive licenses to certain patents and applications filed by others. However, the mere issuance of a patent is not conclusive as to its validity or its enforceability. The U.S. Federal Courts, the U.S. Patent & Trademark Office or equivalent national courts or patent offices elsewhere may invalidate our patents or find them unenforceable. In addition, the laws of foreign countries may not protect our intellectual property rights effectively or to the same extent as the laws of the United States. If our intellectual property rights are not protected adequately, we may not be able to commercialize our technologies, products, or services, and our competitors could commercialize our technologies, which could result in a decrease in our sales and market share that would harm our business and operating results. Specifically, the patent position of biotechnology companies generally is highly uncertain and involves complex legal and factual questions. The legal standards governing the validity of biotechnology patents are in transition, and current defenses as to issued biotechnology patents may not be adequate in the future. Accordingly, there is uncertainty as to:

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whether any pending or future patent applications held by us will result in an issued patent, or that if patents are issued to us, that such patents will provide meaningful protection against competitors or competitive technologies;

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whether competitors will be able to design around our patents or develop and obtain patent protection for technologies, designs or methods that are more effective than those covered by our patents and patent applications; or

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the extent to which our product candidates could infringe on the intellectual property rights of others, which may lead to costly litigation, result in the payment of substantial damages or royalties, and/or prevent us from using technology that is essential to our business.

We have established a portfolio of patents, both United States and foreign, related to our bacterial cell expression technology, including claims to novel promoter sequences, secretion signal sequences, compositions and methods for expression and secretion of recombinant proteins from bacteria, including immunoglobulin gene products. Most of the more important licensed European patents in our bacterial cell expression patent portfolio expired in July 2008 or earlier. The last of the more important licensed United States patents in our bacterial cell expression (“BCE”) patent portfolio expired in December 2014. The last-to-expire patent licensed under the majority of our BCE license agreements is Canadian patent 1,341,235, which is expected to expire in May 2018.

If certain patents issued to others are upheld or if certain patent applications filed by others issue and are upheld, we may require licenses from others to develop and commercialize certain potential products incorporating our technology or we may become involved in litigation to determine the proprietary rights of others. These licenses, if required, may not be available on acceptable terms, and any such litigation may be costly and may have other adverse effects on our business, such as inhibiting our ability to compete in the marketplace and absorbing significant management time.

Due to the uncertainties regarding biotechnology patents, we also have relied and will continue to rely upon trade secrets, know-how and continuing technological advancement to develop and maintain our competitive position. All of our employees have signed confidentiality agreements under which they have agreed not to use or disclose any of our proprietary information. Research and development contracts and relationships between us and our scientific consultants and potential customers provide access to aspects of our know-how that are protected generally under confidentiality agreements. These confidentiality agreements may be breached or may not be enforced by a court. To the extent proprietary information is divulged to competitors or to the public generally, such disclosure may affect our ability to develop or commercialize our products adversely by giving others a competitive advantage or by undermining our patent position.

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Litigation regarding intellectual property can be costly and expose us to risks of counterclaims against us.

We may be required to engage in litigation or other proceedings to protect our intellectual property. The cost to us of this litigation, even if resolved in our favor, could be substantial. Such litigation also could divert management’s attention and resources. In addition, if this litigation is resolved against us, our patents may be declared invalid, and we could be held liable for significant damages. In addition, we may be subject to a claim that we are infringing another party’s patent. If such claim is resolved against us, we or our collaborators may be enjoined from developing, manufacturing, selling or importing products, processes or services unless we obtain a license from the other party.

Such license may not be available on reasonable terms, thus preventing us from using these products, processes or services and adversely affecting our revenue.

We may be unable to price our products effectively or obtain adequate reimbursement for sales of our products, which would prevent our products from becoming profitable.

If we or our third-party collaborators or licensees succeed in bringing our product candidates to the market, they may not be considered cost effective, and reimbursement to the patient may not be available or may not be sufficient to allow us to sell our products on a competitive basis. In both the United States and elsewhere, sales of medical products and treatments are dependent, in part, on the availability of reimbursement to the patient from third-party payors, such as government and private insurance plans. Third-party payors are increasingly challenging the prices charged for pharmaceutical products and services. Our business is affected by the efforts of government and third-party payors to contain or reduce the cost of healthcare through various means. In the United States, there have been and will continue to be a number of federal and state proposals to implement government controls on pricing.

In addition, the emphasis on managed care in the United States has increased and will continue to increase the pressure on the pricing of pharmaceutical products. We cannot predict whether any legislative or regulatory proposals will be adopted or the effect these proposals or managed care efforts may have on our business.

Healthcare reform measures and other statutory or regulatory changes could adversely affect our business.

In both the United States and certain foreign jurisdictions, there have been a number of legislative and regulatory proposals to change the healthcare system in ways that could impact our business. In March 2010, the U.S. Congress enacted and President Obama signed into law the PPACA, which includes a number of healthcare reform provisions that are expected to significantly impact the pharmaceutical industry. The PPACA, among other things, imposes a non-deductible annual fee on pharmaceutical manufacturers or importers who sell “branded prescription drugs” increases the minimum level of Medicaid rebates payable by manufacturers of brand-name drugs from 15.1% to 23.1%; requires collection of rebates for drugs paid by Medicaid managed care organizations; addresses new methodologies by which rebates owed by manufacturers under the Medicaid Drug Rebate Program are calculated for drugs that are inhaled, infused, instilled, implanted or injected, and for drugs that are line extension products; and requires manufacturers to participate in a coverage gap discount program, under which they must agree to offer 50% point-of-sale discounts off negotiated prices of applicable brand drugs to eligible beneficiaries during their coverage gap period, as a condition for the manufacturer’s outpatient drugs to be covered under Medicare Part D. While the law may increase the number of patients who have insurance coverage for our products or product candidates, its cost containment measures also could adversely affect coverage and reimbursement for our existing or potential products; however, the full effects of this law cannot be known until these provisions are implemented and the relevant Federal and state agencies issue applicable regulations or guidance.

Other legislative changes have been proposed and adopted since the PPACA was enacted. On August 2, 2011, the President signed into law the Budget Control Act of 2011, which, among other things, created the Joint Select Committee on Deficit Reduction to recommend proposals in spending reductions to Congress. The Joint Select Committee did not achieve its targeted deficit reduction of at least $1.2 trillion for the years 2013 through 2021, triggering the legislation’s automatic reductions to several government programs. These reductions include aggregate reductions to Medicare payments to providers of up to 2% per fiscal year, which went into effect on April 1, 2013, and are scheduled to remain in effect until 2024. On January 2, 2013, President Obama signed into law the American Taxpayer Relief Act of 2012 (“ATRA”), which, among other things, further reduced Medicare payments to several providers, including hospitals, imaging centers and cancer treatment centers. We expect additional state and federal healthcare reform measures will be adopted in the future, any of which could limit the amounts that federal and state governments will pay for healthcare products and services, which could result in reduced demand for our products once approved or additional pricing pressures, a decrease in the share price of our common stock, limit our ability to raise capital or to obtain strategic collaborations or licenses or successfully commercialize our products.

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The pharmaceutical and biotechnology industries are subject to extensive regulation, and from time to time, legislative bodies and governmental agencies consider changes to such regulations that could have significant impact on industry participants. For example, in light of certain highly publicized safety issues regarding certain drugs that had received marketing approval, the U.S. Congress has considered various proposals regarding drug safety, including some that would require additional safety studies and monitoring and could make drug development more costly. We are unable to predict what additional legislation or regulation, if any, relating to safety or other aspects of drug development may be enacted in the future or what effect such legislation or regulation would have on our business.

We are exposed to an increased risk of product liability claims.

The testing, marketing and sales of medical products entails an inherent risk of allegations of product liability. In the past, we were party to product liability claims filed against Genentech Inc. and, even though Genentech agreed to indemnify us in connection with these matters and these matters have been settled, there can be no assurance other product liability lawsuits will not result in liability to us or that our insurance or contractual arrangements will provide us with adequate protection against such liabilities. In the event of one or more large, unforeseen awards of damages against us, our product liability insurance may not provide adequate coverage. A significant product liability claim for which we were not covered by insurance or indemnified by a third party would have to be paid from cash or other assets, which could have an adverse effect on our business and the value of our common stock. To the extent we have sufficient insurance coverage, such a claim would result in higher subsequent insurance rates. In addition, product liability claims can have various other ramifications, including loss of future sales opportunities, increased costs associated with replacing products, a negative impact on our goodwill and reputation, and divert our management’s attention from our business, each of which could also adversely affect our business and operating results.

The loss of key personnel, including our Chief Executive Officer, could delay or prevent achieving our objectives.

Our research, product development and business efforts could be affected adversely by the loss of one or more key members of our scientific or management staff, particularly our executive officers: John Varian, our Chief Executive Officer; Patrick J. Scannon, M.D., Ph.D., our Executive Vice President and Chief Scientific Officer; Paul D. Rubin, M.D., our Senior Vice President, Research and Development and Chief Medical Officer; Thomas Burns, our Vice President Finance and Chief Financial Officer; and Tom Klein, our Vice President and Chief Commercial Officer. We currently do not have key person insurance on any of our employees.

Our ability to use our net operating loss carry-forwards and other tax attributes will be substantially limited by Section 382 of the U.S. Internal Revenue Code.

Section 382 of the U.S. Internal Revenue Code of 1986, as amended, generally limits the ability of a corporation that undergoes an “ownership change” to utilize its net operating loss carry-forwards (“NOLs”) and certain other tax attributes against any taxable income in taxable periods after the ownership change. The amount of taxable income in each taxable year after the ownership change that may be offset by pre-change NOLs and certain other pre-change tax attributes is generally equal to the product of (a) the fair market value of the corporation’s outstanding shares (or, in the case of a foreign corporation, the fair market value of items treated as connected with the conduct of a trade or business in the United States) immediately prior to the ownership change and (b) the long-term tax exempt rate (i.e., a rate of interest established by the U.S. Internal Revenue Service (“IRS”) that fluctuates from month to month). In general, an “ownership change” occurs whenever the percentage of the shares of a corporation owned, directly or indirectly, by “5-percent shareholders” (within the meaning of Section 382 of the Internal Revenue Code) increases by more than 50 percentage points over the lowest percentage of the shares of such corporation owned, directly or indirectly, by such “5-percent shareholders” at any time over the preceding three years.

Based on an analysis under Section 382 of the Internal Revenue Code (which subjects the amount of pre-change NOLs and certain other pre-change tax attributes that can be utilized to an annual limitation), we experienced ownership changes in 2009 and 2012, which substantially limit the future use of our pre-change NOLs and certain other pre-change tax attributes per year. As of December 31, 2014, we have excluded the NOLs and R&D credits that will expire as a result of the annual limitations. To the extent that we do not utilize our carry-forwards within the applicable statutory carry-forward periods, either because of Section 382 limitations or the lack of sufficient taxable income, the carry-forwards will also expire unused.

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Because we are a relatively small biopharmaceutical company with limited resources, we may not be able to attract and retain qualified personnel.

Our success in developing marketable products and achieving a competitive position will depend, in part, on our ability to attract and retain qualified scientific and management personnel, particularly in areas requiring specific technical, scientific or medical expertise. We had approximately 181 employees as of March 31, 2015. We may require additional experienced executive, accounting, research and development, legal, administrative and other personnel from time to time in the future. There is intense competition for the services of these personnel, especially in California. Moreover, we expect that the high cost of living in the San Francisco Bay Area, where our headquarters and manufacturing facilities are located, may impair our ability to attract and retain employees in the future. If we do not succeed in attracting new personnel and retaining and motivating existing personnel, our operations may suffer and we may be unable to implement our current initiatives or grow effectively.

Our business and operations would suffer in the event of system failures.

Despite the implementation of security measures, our internal computer systems and those of our current and any future collaborators, licensees, suppliers, contractors and consultants are vulnerable to damage from cyber−attacks, computer viruses, unauthorized access, natural disasters, terrorism, war and telecommunication and electrical failures. We could experience failures in our information systems and computer servers, which could be the result of a cyber−attack and could result in an interruption of our normal business operations and require substantial expenditure of financial and administrative resources to remedy. System failures, accidents or security breaches can cause interruptions in our operations and can result in a material disruption of our development programs, commercialization activities and other business operations. The loss of clinical trial data from completed or future clinical trials could result in delays in our regulatory approval efforts and significantly increase our costs to recover or reproduce the data. Similarly, we rely on third parties to supply components for and manufacture our product and product candidates, conduct clinical trials of our product candidates, and similar events relating to their computer systems could also have a material adverse effect on our business. To the extent that any disruption or security breach were to result in a loss of, or damage to, our data or applications, or inappropriate disclosure of confidential or proprietary information, we could incur liability and the development of gevokizumab or any of our other product candidates could be delayed or otherwise adversely affected.

Data breaches and cyber-attacks could compromise our intellectual property or other sensitive information and cause significant damage to our business and reputation.

In the ordinary course of our business, we maintain sensitive data on our networks, including our intellectual property and proprietary or confidential business information relating to our business and that of our customers and business partners. The secure maintenance of this information is critical to our business and reputation. We believe companies have been increasingly subject to a wide variety of security incidents, cyber-attacks and other attempts to gain unauthorized access. These threats can come from a variety of sources, all ranging in sophistication from an individual hacker to a state-sponsored attack. Cyber threats may be generic, or they may be custom-crafted against our information systems. Over the past year, cyber-attacks have become more prevalent and much harder to detect and defend against. Our network and storage applications may be subject to unauthorized access by hackers or breached due to operator error, malfeasance or other system disruptions. It is often difficult to anticipate or immediately detect such incidents and the damage caused by such incidents. These data breaches and any unauthorized access or disclosure of our information or intellectual property could compromise our intellectual property and expose sensitive business information. A data security breach could also lead to public exposure of personal information of our clinical trial patients, customers and others. Cyber-attacks could cause us to incur significant remediation costs, result in product development delays, disrupt key business operations and divert attention of management and key information technology resources. These incidents could also subject us to liability, expose us to significant expense and cause significant harm to our reputation and business.

Calamities, power shortages or power interruptions at our Berkeley headquarters and manufacturing facility could disrupt our business and adversely affect our operations.

Our principal operations are located in Northern California, including our corporate headquarters and manufacturing facility in Berkeley, California. This location is in an area of seismic activity near active earthquake faults. Any earthquake, terrorist attack, fire, power shortage or other calamity affecting our facilities may disrupt our business and could have material adverse effect on our business and results of operations.

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We have a significant stockholder, which may limit other stockholders’ ability to influence corporate matters and may give rise to conflicts of interest.

Entities controlled by Felix J. Baker and Julian C. Baker beneficially own approximately 17.9% of our outstanding common stock as of March 31, 2015, which includes warrants to purchase approximately 7.6 million shares of XOMA’s common stock at an exercise price of $1.76 per share. On July 19, 2012, our Board of Directors elected Kelvin Neu, M.D., to serve on our Board of Directors. Dr. Neu is a Managing Director at Baker Bros. Advisors, LLC, an entity controlled by Felix J. Baker and Julian C. Baker. Accordingly, these entities may exert significant influence over us and any action requiring the approval of the holders of our stock, including the election of directors and approval of significant corporate transactions. In addition, on June 12, 2014, we entered into a registration rights agreement with entities affiliated with Felix J. Baker and Julian C. Baker, pursuant to which we subsequently filed a registration statement to register for resale the shares of our common stock (including shares issuable upon the exercise of warrants) held by these entities. Furthermore, conflicts of interest could arise in the future between us, on the one hand, and these entities, on the other hand, concerning potential competitive business activities, business opportunities, the issuance of additional securities and other matters.

Our organizational documents contain provisions that may prevent transactions that could be beneficial to our stockholders and may insulate our management from removal.

Our charter and by-laws:

•

require certain procedures to be followed and time periods to be met for any stockholder to propose matters to be considered at annual meetings of stockholders, including nominating directors for election at those meetings; and

•

authorize our Board of Directors to issue up to 1,000,000 shares of preferred stock without stockholder approval and to set the rights, preferences and other designations, including voting rights, of those shares as the Board of Directors may determine.

In addition, we are subject to the provisions of Section 203 of the Delaware General Corporation Law (the “DGCL”), that may prohibit large stockholders, in particular those owning 15% or more of our outstanding common stock, from merging or combining with us.

These provisions of our organizational documents and the DGCL, alone or in combination with each other, may discourage transactions involving actual or potential changes of control, including transactions that otherwise could involve payment of a premium over prevailing market prices to holders of common stock, could limit the ability of stockholders to approve transactions that they may deem to be in their best interests, and could make it considerably more difficult for a potential acquirer to replace management.

ITEM 2.

UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

None.

ITEM 3.

DEFAULTS UPON SENIOR SECURITIES

None.

ITEM 4.

MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5.

OTHER INFORMATION

On May 7, 2015, the Company issued a press release announcing the Company’s financial results for the first quarter ended March 31, 2015. A copy of the press release is furnished as Exhibit 99.1 to this report.

ITEM 6.

EXHIBITS

See Index to Exhibits at the end of this Report, which is incorporated by reference here. The Exhibits listed in the accompanying Index to Exhibits are filed as part of this report.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	XOMA Corporation

Date: May 7, 2015	By:	/s/ JOHN VARIAN
		John Varian Chief Executive Officer (principal executive officer) and Director

Date: May 7, 2015	By:	/s/ THOMAS BURNS
		Thomas Burns Vice President, Finance and Chief Financial Officer (principal financial and principal accounting officer)

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EXHIBIT INDEX

		Incorporation By Reference
Exhibit Number	Exhibit Description	Form	SEC File No.	Exhibit	Filing Date

3.1	Certificate of Incorporation of XOMA Corporation	8-K	000-14710	3.1	01/03/2012

3.2	Certificate of Amendment of Certificate of Incorporation of XOMA Corporation	8-K	000-14710	3.1	05/31/2012

3.3	By-laws of XOMA Corporation	8-K	000-14710	3.2	01/03/2012

4.1	Reference is made to Exhibits 3.1, 3.2 and 3.3

4.2	Specimen of Common Stock Certificate	8-K	000-14710	4.1	01/03/2012

4.3	Form of Certificate of Designations of Series A Preferred Stock	8-K	000-14710	3.1	01/03/2012

4.4	Form of Amended and Restated Warrant (June 2009 Warrants)	8-K	000-14710	10.6	02/02/2010

4.5	Form of Warrant (December 2011 Warrants)	10-K	000-14710	4.9	03/14/2012

4.6	Form of Warrant (March 2012 Warrants)	8-K	000-14710	4.1	03/07/2012

4.7	Form of Warrant (September 2012 Warrants)	8-K	000-14710	4.10	10/03/2012

4.8	Registration rights Agreement dated June 12, 2014, by and among XOMA Corporation, 667, L.P., Baker Brothers Life Sciences, L.P., and 14159. L.P.	8-K	000-14710	4.1	06/12/2014

4.9	Form of Warrant (December 2014 Warrants)	8-K	000-14710	4.1	12/09/2014

4.10+	Form of Warrant (February 2015 Warrants)

10.1	Amendment No. 2, effective January 9, 2015, to the Loan Agreement, effective December 30, 2010, by and among XOMA (US) LLC, Les Laboratoires Servier and Institut de Recherches Servier	10-K	000-14710	10.71	3/11/2015

10.2	Amendment No. 2, effective January 9, 2015, to the Amended and Restated Collaboration and License Agreement, effective February 14, 2012, by and among XOMA (US) LLC, Les Laboratoires Servier and Institut de Recherches Servier	10-K	000-14710	10.72	3/11/2015

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10.3+		Loan and Security Agreement, dated February 27, 2015, by and among XOMA Corporation, XOMA(US) LLC and XOMA Commercial as borrowers and Hercules Technology Growth Capital, Inc., as agent and lender

10.4+		Employment Agreement by and between XOMA Corporation and Thomas Burns, dated as of April 3, 2015

10.5+		Change of Control Severance Agreement by and between XOMA Corporation and Thomas Burns, dated as of April 3, 2015

31.1⁺		Certification of Chief Executive Officer, as required by Rule 13a-14(a) or Rule 15d-14(a)

31.2⁺		Certification of Chief Financial Officer, as required by Rule 13a-14(a) or Rule 15d-14(a)

32.1⁺		Certification of Chief Executive Officer and Chief Financial Officer, as required by Rule 13a-14(b) or Rule 15d-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. §1350)⁽¹⁾

99.1++		Press Release dated May 7, 2015

101.INS⁺		XBRL Instance Document

101.SCH⁺		XBRL Taxonomy Extension Schema Document

101.CAL⁺		XBRL Taxonomy Extension Calculation Linkbase Document

101.DEF⁺		XBRL Taxonomy Extension Definition Linkbase Document

101.LAB⁺		XBRL Taxonomy Extension Labels Linkbase Document

101.PRE⁺		XBRL Taxonomy Extension Presentation Linkbase Document

+	Filed herewith

Furnished herewith. The information in Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that Section or Sections II and 12(a)(2) of the Securities Act of 1933, as amended. The information contained in Exhibit 99.1 shall not be incorporated by reference into any filing with the U.S. Securities and Exchange Commission made by XOMA Corporation, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

(1)

This certification accompanies the Form 10-Q to which it relates, is not deemed filed with the Securities and Exchange Commission and is not to be incorporated by reference into any filing of the Registrant under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended (whether made before or after the date of the Form 10-Q), irrespective of any general incorporation language contained in such filing.